Used Sequential Instruments

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United States|Founded 1974|7 instruments tracked|65 active listings

About Sequential

Sequential is a United States-based manufacturer founded in 1974. We track 7 Sequential instruments across the used market. Browse current Sequential listings from Reverb, eBay, and other marketplaces to search and find the best deals.

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Buying Used Sequential: Practical Guide

When buying used Sequential instruments, condition is paramount. Inspect for signs of wear. Keybed responsiveness is crucial; sticky keys often signal deeper issues. Models like the Prophet-5 are accompanied by high demand. Expect to pay between $3,000 and $5,000 depending on condition and configuration. The Six-Trak typically sells for around $700-$1,200; it's less iconic but offers superb value. Avoid instruments with major modifications unless that’s what you seek. Non-original parts can lower value and complicate repairs. Proof of service records can justify a premium. Be wary of models re

Sequential Production Eras

Original Era

1978-1985

The early models feature a unique analog sound quality, largely untouched by later digital integrations. This era is revered for warmth.

Collectible — price accordingly.

Revived Production

2015-Present

This era marked Sequential’s re-entry into the market with updated technology, blending classic sounds with modern capabilities. These instruments cater well to contemporary needs.

Best value.

Dating Sequential Instruments by Serial Number

To date Sequential instruments, locate the serial number often found on the back or underside. It's typically formatted as a series of digits; the first few digits often represent the production year. Confirm dates against resources like SynthWiki or dedicated Sequential forums for accuracy. Check multiple sources if you find conflicting information, as re-sold instruments sometimes have tampered.

Verifying Authenticity

  • Check for original components; replaced hardware lowers value.
  • Inspect for any signs of refinishing on the panel or case.
  • Verify factory specs with manufacturer documentation to spot modifications.
  • Use the serial number to confirm the production year against the original specifications. This reveals potential mismatches.

Known Issues to Check

  • Keybed issues range from sticky keys to complete failure, especially in older models.
  • PWM circuits can develop faults; listen for inconsistency in modulation.
  • Power supply issues can lead to erratic behavior; check for replacements.
  • Knob and slider wear can compromise functionality; test all controls before buying.

Sequential Instruments

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Used Sequential for Sale

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Frequently Asked Questions

What should I pay for a used Prophet-5?

Expect to pay between $3,000 and $5,000, depending on condition and unique features.

Are modifications a red flag?

Yes. Non-original parts or mods can reduce value and complicate repairs.

How can I ensure I'm getting a genuine Sequential?

Check the serial number against known databases to verify age and origin.

Why are some models more expensive than others?

Factors include rarity, condition, and demand; older models usually fetch higher prices.

What types of issues should I inspect before buying?

Look for keybed issues, power supply problems, and wear on all controls.