I just saw a short u-tube video put on by Hagerty Insurance that was referring to the 55-57 2-door birds and that a decent one can start if you are lucky at $10K up to over $100K. They also ( at Hagerty Insurance) have an analysis available online for determining worth of the classics. Hope this helps. Dave.

The magazine Old Cars Price Guide, which is on the magazine shelves of better bookstores and newsstands. They used to be sealed in plastic and you had to buy them, but just last weekend I discovered that they are no longer sealed in plastic, so you can browse it at the bookstore, and see for yourself without buying one. They have the most current auction prices of the vehicle year/make/model in question, rated from 1 to 5, 5 being best; the front of the magazine has a guide as to how to select a "1" from a "5", obviously if it had to be towed to the auction, it wasn't a "5" (LOL)