HO Kato Roller BearingTrucks.

They don’t get any cheaper.

http://www.internettrains.com/kahoscbas270.html

Wow, you’re right! That’s less than half of what I have seen them priced at. As soon as the word gets out, these will probably disappear in a hurry as people start scarfing them up. Kato trucks are some of the smoothest rolling ones I have found.