I just finished posting several hundred additional casino hotel room key cards to my Delcampe store. All are listed at $2 each plus shipping and we can deal direct if you do not want to buy through Delcampe. Many of the cards are from the Venetian, including quite a few different Chinese New Year cards!

Here's a link to the store front room key listings, the latest cards will appear first but in reverse alphabetical order by casino name (the Venetian cards are near the beginning)....
https://www.delcampe.net/en_GB/collectables/search?seller_ids%5B0%5D=554914&categories%5B0%5D=20169

There's actually over 3,000 hotel room keys listed now but that includes non-casino hotel key cards too.

I do have lots of extras so I'll keep relisting things as they sell thus you may want to check back a few times. These usually sell pretty quick once they're posted.