Kyle, if you're not checking E-bay, you might be missing something good.
(Like a $2500.00 Targa, or a "Pimped-out retard bike" P.O.R.B.")
But, seriously, some good things do come up. Although some of the forum regulars have had some trouble with certain sellers.....
Some sellers have tried to sell crap on E-bay for a lot more than it's worth, but you should always check. I've seen some sweet machines, and there's always a bunch there. I would think it's a matter of time before something comes up in your area.
I think Simon has a link to E-bay "Moped Search" in the resources section, but for some reason, I think it was broken last time I tried to use it.