Did you look up completed auctions? You have to go to the advanced search to do so, and be logged in. Actually, you may be able to go to completed listings by clicking on a link just below the search bar after you do a search. Better yet, they now have a 'sold auctions' in that same spot.

Two disc only U.S. bomberman have sold lately. One for 50 and one for 70, so you are looking in that range depending on what shape your disc is in. House of the Dead looks like 75-100 or so. For both of these I added "-jp -japan -import" because there are a lot of people selling those versions and that just clouds up your results.

I'll leave the PSone for you to look up, but my recollection/guess would say ~$40.