I don't collect slot cards but do collect some room keys and have a bunch to trade. I'm looking for some Hard Rock room keys, and others that catch my eye. I always offer 3 or 4 or more of the new releases I get in trade for some of the older Hard Rock keys. Haven't been able to find trades so I usually will list new keys for sale and then buy what I wanted to trade for.

http://www.thechipboard.com/index.cgi/page/1/md/read/id/1389677/sbj/nr-i-think-venetian-palazzo-room-keys/

Looking for these:

http://www.thechipboard.com/archives/archives.pl/bid/399/md/read/id/1381846/sbj/looking-for-these-hard-rock-room-keys/

I am going to start scanning all the extras I have and hopefully can get some trades made.