I bought a pair of Barska Atlantic 10x42 roof prisms from Cabela's. They were fifty bucks, and I'm pretty pleased with them.
I didn't want a really expensive pair because I'm prone to losing things (I still can't find one of my 35mm cameras with a $200 28-200 zoom lens on it). D'oh!
If you want to go super-cheap, try a pair of Simmons Red Line 10x50 binoculars from Wal-Mart for about $25. They're really pretty good in low light.