Sony TC-K770ES Value & Price History
As of 2026-09-21, a Sony TC-K770ES has a market value at around $300. Based on 52 estimated sales.
Specifications
| Years produced | 1990–1994 |
| Type | Cassette Deck |
| Brand | Sony |
| Original MSRP | 1,200 (1990) |
| Inflation-adjusted | ~$2,900 today |
| Market value (sold) | $300 |
Buying notes
Sony ES three-head. Head condition is primary. Request a recording. Sony ES build quality is high. Rubber service $50-80. Verify Dolby B and C work correctly. Good value relative to Nakamichi pricing.
Parts & supplies
Common maintenance items for the Sony TC-K770ES. eBay links are model-specific searches; Amazon links are for generic supplies that work across most equipment.
- Sony TC-K770ES belt and pinch roller kit on eBay →
- Sony TC-K770ES pinch roller on eBay →
- TDK SA90 — Type II (high bias), works in any deck with a Type II setting on Amazon →
- Maxell UR blank cassette — Type I, reliable everyday tape on Amazon →
- Cassette head cleaner — wet-type for capstan and heads on Amazon →
- 99% isopropyl for transport cleaning (avoid lower concentrations) on Amazon →
- Cassette head demagnetizer — reduces noise and distortion over time on Amazon →
Purchases through these links may earn StereoWorth a small commission at no extra cost to you. See our affiliate disclosure. Repair budgeting: what vintage stereo repair actually costs.
Comparable models
- Sony TC-K909 $185
- Sony TC-K690 $185
- Sony TC-K81 $160
Current listings
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Search Sony TC-K770ES on eBay → Search Sony TC-K770ES on Reverb →Track this model
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