I've dusted off my old Scott Comp Racing (from around '98 IIRC) and despite wearing padded shorts, the saddle is really uncomfortable after a few miles.
I could do with a replacement that is not too expensive, under £30 if possible.
But also, even the best saddle *for you* will be uncomfortable for a while if you've been off the bike for any length of time. You do need to spend some time acclimatising to being back on a bike.