Take a look at the Epox 8kta+. It can be purchased for $97 + no profit on shipping from Axiontech.com. I purchased this MoBo 4 months ago and flashed the original BIOS in December to 12/10/00 Rev. Rock solid, no lockups or BSODs whatsoever. Anandtech reviewed this MoBo and thought the stability above average but could be alittle bit better. The fact is that they tested it with the original release BIOS. The latest BIOS has been tweeked to it's present level of excellent stability and you can download it from the Epox website. If you want to go to the other end of the price spectrum look at the Epox 8KTA3 which Anandtech rates as one of the top three KT133A chipset MoBos available. It's at Axiontech.com for $127.
Check out my rig to see how this MoBo OC's.