I bought my Janome MC 10001 on eBay. The seller misspelled Janome and didn't put the model name in the listing. I got mine for $780 including shipping!!!! All the original parts, extra software and hoops. Has been my workhorse for 4 years now. The seller packed it like a champ.
I eBay all the time:selling and buying. If it's breakable, insure it. Consider the shipping to be part of the price and do your research.
You can get ripped off anywhere. EBay, craigslist, garage sale, neighbor, co-worker, retail store don't be afraid of eBay alone.