'Round here pic a parts are charging $25-35 for a carb. Rebuild kits from $15-30 depending on where you get it from. Hence investment could run between $40-$60 PLUS the time to drive to the yard, find the carb (hopefully a 1.08), remove it, take it home, rebuild it, and hope it works. $99 buys you a factory rebuild at Autozone.
Just a thought