I recently came across Offandaway.com. I've been having tons of fun, even though I have never won.
This travel site CAN be fun IF you just do two things before you begin bidding:
1st: If you want to have fun, you ABSOLUTELY need to be someone who is PLANNING TO TRAVEL. In that way, if you lose, the money is not lost, since you can "recycle" the used bid money to book your next vacation through Offandaway, anyway.
I told myself, "Hey, I'm going to be using the used bid money to book a trip anyway, so I might as well see if I can win a bonus trip!" Well... I lost 3x in a row, and I laughed when I lost. AGAIN, THE MONEY IS NOT LOST IF YOU INTEND TO TRAVEL WITH IT ANYWAY. I will be using my recycled bid credits to book at trip to Tahoe in the next few days.
2nd: Read the auction rules! I spent at least 5-minutes reading through the auction rules, because I was initially skeptical. Offandaway is definitely not a scam. They are a travel agency using auctions to bring in customers. THAT IS WHY YOUR USED BIDS CAN BE USED TO BOOK TRIPS!
Again, look through Offandaway and plan your vacation first. If you're going to book a trip anyway, you can't really lose!