Historic Information - DeLorean Price Guide
You really can get a lot of car for the money buying a DeLorean. Regarding pricing, my general rule of thumb is that a good condition car with less than 20,000 miles can be had for $20000. There are some bargains out there as well, but these often require a bit of mechanical work. Prices have been surprisingly stable and pristine cars are selling in the $25000 - $30000 range.
A study of the actual selling prices of DeLoreans over the last 10 years or so derived from data supplied by Cars of Particular Interest (CPI is the Blue Book for special interest automobiles) is available in the back issues of the DeLorean Club of Oregon newsletter.