As with anything...it depends on your budget...i just bought mine a month or so ago after about a 6 month search. I was looking for something under $30k, which limited the field to cars that were a little older. Higher budgets ($50k + ) can go with Backdraft, Superperformance, Kirkham, ERA, etc. You can find some in the 30-40k range that are very good too...Lonestar, Factory Five, etc. The quality of the build and quality of the engine will make all the difference. I would start a list of thing you must have in the car (ie I only wanted a big block) and that will help you narrow down your field also. The other thing i did was to track cars for sale on Cobra Country, Ebay, Craigslist and Factory Five Forums and especially the For Sale here....that way i learned what the market was or was not for certain cars.
Best of Luck...it is a wonderful day when you bring it home ...
