I assume that you are looking for a brushed ESC? If you are really, really low on funds, then these are alright: http://www.ebay.com/itm/320A-Speed-B...ht_2866wt_1185

If you have a couple bucks and want a capable ESC which will probably out last the truck under normal conditions, then these have always been good: http://www.ebay.com/itm/New-Slash-XL...#ht_500wt_1202

There are plenty of other options out there, so just look around.