If you are thinking of buying VIP passes for Las Vegas on Ebay, thinking that you are getting a sweet deal, let me break it down for you. 

I bought some passes last month, as I was going to Las Vegas on vacation.  I wanted to go out and party all week, so I figured, might as well have free passes to all the clubs, and save a bunch of $$ right.  Anyways, the truth is, that you can get VIP passes to ANY club just walking down Las Vegas Blvd.  You will get hounded by street hustlers trying to give you all kinds of stuff, such as club VIP's, and some aspiring artists even give out a copy of their music CD...which i found quite funny lol!  Anyways, most VIP passes are NOT VIP.  It's free admission between 10pm and midnight mostly, in other words, the "quiet" club time.  Do not believe the "No Line" selling point either, you still have to wait in line, and also be aware that clubs have the discretion to reject it if they want to.  Also, at the majority of places, they are "special offers" when you arrive at the door, some that are even better than the VIP pass.  For example, I went to the club called The Beach, with a pass that was Free Admission and Two Free Drinks.  I thought it sounded awesome as a deal.  Anyways, I got there, and they informed me that they had another offer going on, which was $20, unlimited beer and vodka drinks for the night!  So, in reality, you dont need VIP passes....like a cab driver told me, "Everyone's got VIP's"  hehehe

Just my two cents ;)