One could do worse than finding a Gillette Super-Speed adjustable razor in decent condition. A little work with an old toothbrush would have it cleaned up and ready to go, I shaved with one for years, and never had a problem.
15 BMW RnineT
10 Ducati 1098 Streetfighter S - "Sleipnir"
09 Kaw Versys
67 Triumph Bonneville TT Special