A bit of general advice...if you want one good vintage set, don't try to get one "on the cheap" if it's a later era ('70s-80s) or a "fixer upper" that has a lot of mods or needs parts or is missing a floor tom. Often you'll end up spending more on parts and be forever unhappy.
If you don't find a cool old set at a flea market, garage sale or music store...and finds like that still do exist, talk to an experienced vintage person, spend some more $, and get a nice, complete, original "collectible" set.
(Of course, it will take more $, and nowadays that's not so easy.)
In the long run you'll be better off, and most of the time, if you decide to sell, you'll get your money back or even make a profit.
There are still good vintage deals out there..even on ebay. Some Slingerland sets from '60s and early '70s sell for well under $1000. Early '70s Rogers sets, especially in Black, white or faux wood colors sell for low money as well.