I can't see any profit in this venture unless you know something I don't? The bloke who sold me the MZ (all original, 5000 KM on the clock, nothing worse than a marginally rusty exhaust and slightly dodgy electrics (the guys failure if he wanted to do this for profit) to show for 14 years old) seemed to be a buy-tidy-sell merchant, his next project was a 60's Triumph in the garage. He claimed he'd broken even on the zed, but in the paperwork he provided you could only say he'd broken even if you discounted all the costs like going to Liverpool to get it and an MOT and back tyre he'd put 500 miles on. I just don't think there is anything to be made in commuter bikes.
Now, if you want to buy a Harley tomorrow, give it a good clean, get it MOT'd, put a few new bits of chrome on and flog it in June, I think that's a different matter if the economy picks up.
Andy