Depends on the age and condition, if they've been stored properly, clean and newer comb, it's worth a try to reuse the frames. If everything is gnarly and old comb,toss the frames and scrub everything down with a bleach/water solution and repaint. Frames and foundation are cheap, packages aren't.
IMO it ain't worth buying used equipment, just like cruising the bars, you don't know what you'll pick up.