Casio Guitar Dg 20: A Complete Buyer's Guide

The Casio Guitar DG-20 is a rare and fascinating piece of music technology. Released in the 1980s, this guitar combines traditional playing with built-in drum machines, sound effects, and primitive digital sounds—making it instantly recognisable and highly coveted by collectors and curious musicians alike. If you're considering buying one, you need to know what separates a genuine find from an expensive mistake. This guide cuts through the nostalgia and delivers practical advice for making a smart purchase.

Understanding What You're Actually Buying

The DG-20 isn't a conventional guitar. Yes, it has six strings and plays like one, but its real charm lies in the electronics. Think of it as a 1980s digital workstation dressed up as a guitar. It features dozens of drum patterns, sound effects, and tone variations built directly into the instrument. Some sounds are playable through the strings; others trigger via dedicated buttons. This dual nature is precisely why buyers love it—and why you need to inspect one thoroughly before committing money.

Before you buy, understand your own motivation. Are you after a playable instrument or a vintage collector's piece? The answer drastically changes what you should look for. A player's guitar has different requirements than a display piece.

Key Specs and Build Quality to Inspect

The guitar portion of the DG-20 is solid but not remarkable. Here's what matters:

• Body condition: Check for cracks in the plastic body. Unlike wooden guitars, plastic bodies can develop stress fractures that affect electronics underneath. Run your fingers along seams and edges.
• Fretboard: Examine the frets for flatness. A warped neck makes the guitar nearly unplayable. Play up and down each string at multiple frets to spot dead zones or buzzing.
• Electronics housing: Look where the battery compartment closes. Corrosion here suggests previous water exposure or battery leakage. This is a red flag for internal electronics failure.
• Button responsiveness: Press every button. Sticky buttons are common and often indicate age or debris, but they can sometimes be cleaned. Buttons that don't respond at all might indicate failed circuits.
• Screen (if equipped): Some DG-20 models feature a small LCD display. Check for pixel damage or complete darkness. Replacement isn't feasible for most buyers.

For a more detailed technical breakdown, our complete guide to the Casio Guitar DG-20 covers full specifications and features.

The Electronics: Where Problems Hide

This is where most DG-20 purchases go wrong. The electronics are the guitar's heart, but they're also the most likely to fail.

Battery compartment: Open it and look inside. Clean contacts are shiny and unoxidised. White or green oxidation means the battery has corroded internally. If the guitar powers on despite corrosion, the electronics may be failing intermittently. Budget £50-£100 for professional cleaning if you proceed.

Sound output: Plug the guitar into an amplifier (ask the seller if one's available) and test every drum pattern and effect. Listen for crackling, dropout, or distortion that changes with button presses. Most DG-20s develop some audio noise with age—this is normal. Intermittent audio cutting out is not normal and suggests failing capacitors.

Drum machine stability: Start a drum pattern and let it run for two minutes. Does it maintain tempo? Does the rhythm stay consistent? A drum machine that gradually speeds up or slows down indicates failing components.

Tone variety: Switch between different guitar sounds and effects. Each should be distinctly different. If multiple sounds are identical, internal switching logic has failed.

Price Tiers and What They Mean

Casio Guitar DG-20 prices vary wildly depending on condition and working order. Here's what you should expect to pay:

• £200-£350: Non-working or severely broken electronics, significant body damage, or missing accessories. Only buy at this price if you're buying for display or are experienced in electronics repair.
• £350-£600: Partially working (some electronics functional, some not). Playable as a guitar but with electronics issues. Cosmetic wear visible. Suitable for collectors who accept limitations.
• £600-£900: Fully working or minor electronics issues. Good cosmetic condition. Everything plays and sounds as intended. This is fair market for a functional vintage instrument.
• £900-£1,500+: Pristine condition, original accessories, complete documentation, or documented provenance. Investment-grade or display pieces.

Avoid overpaying for cosmetic condition alone. A mint-looking DG-20 with dead electronics is an expensive paperweight. A rougher example that actually works offers infinitely more value.

Critical Pitfalls to Avoid

Protect yourself by avoiding these common mistakes:

• Buying without testing: Online purchases of vintage electronics are risky. Insist on video demonstrations showing the guitar powered on, drumbeats playing, and effects working. No video? Walk away.
• Ignoring battery issues: If the seller says "batteries included" but the battery compartment shows oxidation, assume it hasn't worked in years. Corrosion doesn't reverse itself.
• Assuming all DG-20s are the same: Casio made several variants. Ensure you're buying the exact model you want—aesthetics and feature sets differ between versions.
• Underestimating repair costs: Professional electronics repair runs £100-£300. Factor this into your maximum offer if electronics aren't perfect.
• Forgetting the string situation: Vintage strings corrode. Budget £10-£20 for a new set as part of your purchase.

Accessories and Completeness: Do They Matter?

A DG-20 with original documentation, manual, cables, and packaging commands a premium—typically 20-30% more than a bare guitar. However, only pay extra for these if you specifically want them. As a player, you don't need the original manual (it's available online). Original cables add nothing to the playing experience.

Missing parts are fine if the price reflects it. You don't need matching everything; you just need working components that suit your needs.

Where to Buy and Negotiation Strategy

Casio Guitar DG-20s appear on specialist vintage music forums, eBay, and collector sites. Private sales through music forums often yield better prices because sellers aren't inflating for platform fees. However, you lose buyer protection.

Approach every listing as if the price is negotiable. If you're in-person, bring cash and an amplifier to test. Demonstrate knowledge of typical failures and use that to negotiate downward. A seller facing a serious buyer who knows the instrument's quirks will often accept lower offers rather than wait for someone else.

New vs. Secondhand: Is Buying New Worth It?

Casio doesn't manufacture the DG-20 anymore, so "new" means factory-sealed stock discovered in old warehouses. These command premium prices (often £1,000+) for novelty value. Unless you're a serious collector or absolutely need pristine condition, a well-maintained used example offers the same experience at half the cost.

Making Your Final Decision

A smart DG-20 purchase balances functionality with price. A fully working example in decent cosmetic condition—not pristine, but played and loved—at £500-£700 is genuinely good value. The same guitar in mint condition asking £1,200 is speculation, not investment.

Test everything before money changes hands. Listen to the sounds, play a rhythm pattern, check the battery compartment, and run through every button. If it all works and you love how it plays, the slightly scuffed plastic casing won't matter once you're performing or recording.

The Casio Guitar DG-20 is a unique instrument that rewards informed buying. Go in with eyes open, understand the common failure points, and you'll find a functional and fascinating piece of musical history.