Bonsour Gabby,
I am not a seller, so I am not familiar with the selling system. But, I would suggest these links, and hopefully you can find what you need there.
1- ebay.com-----after the ebay home site comes up. You can try the different help sites at the top. I have noticed that under the heading COLLECTABLES then click on casino. I have noticed casino items can be bid/bought. If no luck here, you can call e-bay at 1-408-555-7400. And Ask them what you need to know. You might call them first, if you want.
2- Jackpotauctions.com-----Bring up this site. And see if you can find what you want. Or you might e-mail Norman Clem at norman@schip2u.com
He is one of the persons involved in the jackpot auctions team. He can probally answer your questions.
Hopefully this will help you.
Dan