Ben, just curious, what do you need to replace the starter for?
A couple of common Briggs starter problems can be repaired without replacement if they are the right ones:
Squeeling? Dissasemble and lube the bearings, unless it's an older one, then you can just shoot the upper and lower bushings with some lube and solve that problem. If the starter gear or bendix is worn or wiped out you can get a kit to replace them. I have seen very few wiped out Briggs starters in comparison to the amount I've worked on. Most can be repaired with minimal cost. Then there is the possibility it's not the starter at all, but a saftey switch, solenoid or wiring problem, compression release/valve problem, pto clutch hanging up, could also be the case.