3-5 already exist. I could definitely go for a motorcycle, though.
2 would require a small "vehicle" (Germany didn't employ crew-served heavy machine guns). Something like a 2cm FlaK 30 or 38, 2.8 cm sPzB 41 or a 3.7cm PaK 36.
1, I'm sure someone would want it. Can't say I'm entirely...