Stock-ish Maxi I did for my wife a few years back. It has seen very little use but starts easy and rides smooth.
50cc kit / head
Rebuilt engine w/ new bearings & seals (stock crank)
Del Sha carb
Boss Pipe to keep'er quiet
Easy 30-35 MPH
Asking $800, which admittedly is a lot for a slow maxi, but that's the asking price. No trades.