Beware of escalating costs with vintage mopeds, engines can seize-up without warning especially if it hasn't been run for a long time, and repair bills cost virtually the same as you would pay for a full-size motorcycle, so it's best if you know how to fix them yourself. Electrics are pretty easy to work on and I would encourage anyone to have a go because almost invariably any electrical fault will be something simple and obvious - bad earths, broken wires and blown bulbs. I suppose the same might be true of motorcycles but on a moped it's usually dead easy to get at the wiring.