The Aussie Defence Force has it's own (very) restricted internet network, and there's a "Classified Advertisment" section where servicemen and defence public servants can buy, swap or sell just about everything, including motorcycles.
A guy in Canberra was going thru a messy divorce and was selling his old BMW R75/5 and Laverda 750SF cheap. I rang him about the BMW but he'd already promised it to a guy in Sydney, but the Laverda was still available. I bought it over the phone, bank transferred him a $500 deposit and paid him the remaining 5 thousand bucks when I collected the bike on the following Saturday.
I rode it for a few weeks, but couldn't get into it, so I put it on EBay and a guy in Western Australia bought it for a whopping $10,750. That was great, I still owed my brother 5 grand for my Triumph Rocket III, so I was able to settle that debt in one fell swoop.
Buying and selling bikes can be very profitable hobby, but as has been said before, you just can't hesitate, nor should you expect a seller to hold a bike forever just because you're a nice guy. Cheers, Terry.