Where are you located? In the states? I ask because I see a number of them on paperbackswap.com. I have a bunch (like 10) of credits on that site that I'm not using, and if the books you are looking for are on there, and I *think* I could have them shipped to you at literally no cost at all to me. (If I'm wrong, I might have to have them shipped to me first, then send them to you...which would also be the way to do it if you're outside the lower 48.)
So, if you'd like, take a look at the site (you might have to create a free account to see what's there, not sure) and let me know which titles interest you... if you find some you want, let me know where to send them (PM, of course) and I'll see what I can do.
The only thing that I'll have to watch for is to make sure to ask the senders that the copy they're sending is actually "old" rather than a reprint, but should be do-able.
Take a look and let me know what you think.
