You have to have an Ebay account. Log in, search for something, then look down in the left hand column of stuff, and tick "Completed Items" under the "Show Only" section. It will show items for the last 3(?) months and also show what they sold for (or if they sold).
*** As a side note, when you search, you can use 'wildcards'...
chev* will pick up chev, chevrolet, chevy, or even chev@#$% for that matter.