I've bought some of my dolls on ebay! :D That's actually where I got my Cupid and other Sweet 1600 dolls. I actually bought my first MH ever off of ebay! xD I was out in a remote field camp at the time and had bought a Gloom Beach Frankie to be sent out to me there. xD
If you're not trying to get the new lines right as they're coming out on ebay, I haven't actually really had a problem with scalpers and have had pretty good luck with finding things there. :3