Martin 0-21

The items shown to the user are:

1. Martin 0-21 — Guitar Resale Value (Acoustic Guitars) — $8549.99 used 2. Martin 00-21 — Guitar Resale Value (Acoustic Guitars) — $10153.38 used 3. Martin 000-21 — Guitar Resale Value (Acoustic Guitars) — $14900 used

These listings are based on the catalog search results, and they do not contradict any of the items shown to the user from the catalog. The live eBay asks for "Martin 0-21" is as follows:

- Live eBay ask: 2 listings, median price $8549.99.

The catalog values are significantly higher than what sellers typically ask today on eBay, with the highest value being $14,900 used for a Martin 000-21 guitar. The other items listed in the user's question have lower values and were shown to be different products based on their descriptions.