I check out Shop GW every day!! I have gotten 2 machines off there...they both came in fine condition, although my 99 was packed really carelessly and is lucky to have made it in 1 piece!!
What stops me most of the time is the high shipping costs. Some of those stores will only ship USPS, and the parcel post rates are ridiculous!!
Plus...(ok, I'm bitchin' a little here), some of the stores only do PICK UP ONLY on sewing machines, which leaves out anyone not in that city. BOO!!