Yo, Wesley. I'm going to make the post that I make every year about this time so that everyone is fresh n the story. I hope things haven't changed.
Anyway, sure - you can buy someone's pre-entry, and he can you can decide the price. It's common and a sure way to get your entry.
Another way is to arrive at the salt and find someone that's selling. It's not difficult - there's usually a list or sign board or something posted at the registration trailer where wanted/unneeded entries can be listed. Hook up with someone there and MAKE SURE YOU THEN GO TO REGISTRATION TO COMPLETE THE TRANSFER. Again - price is up to youse guys. Help each other out, you hear?