amazon is usually my 1st choice for laptop batteries and AC adapters. usually around $50 if you go with OEM
I looked on ebay and they all seemed like they weren't OEM, and the few OEM's that were on there were $125+ Anybody ever bought a non-oem battery?
batteries.com laptopbattery.net batteriesplus.com I've bought and used non-OEM batteries... they work the same.
bought one on Ebay for an old Toshiba. The seller was cbk_usa_electronics and they had the best price I could find anywhere. Got it in 3 days.