I have some baseball cards, how can I tell how much they are worth?

Question

I have a whole box of topps Baseball cards. There are 1988 yearbook stickers and bubble gum. It says new superstar card on back of each sticker. There are 48 packs marked 25 cents each and they each have 5 stickercards and a piece of gum. Any ideas how much they are worth, or how to find out? We paid $5 for them at a yard sale, did we make a good investment??? so in total we have 240 cards and 48 pieces of stale gum (LOL)!

Answer 1

use a beckett

Answer 2

Unfortunately Topps put out TONS of stuff in 1988 including these stickers.  They are worth less now than they were in 1988.  Five dollars is probably a fair price to pay for a box of those.  There's one for sale right now on ebay for $3.99 but then you have to pay shipping on top of that.

http://cgi.ebay.com/1988-Topps-Baseball-...