I bought a new, sealed boxed Janome 11000 on ebay, from a newlywed who received it for a wedding gift . She didn't sew.
I thought it might be stolen after I received it, since it had not been opened and was selling for a low price. I had my local dealer check the serial number with Janome. They informed me that the machine was not stolen, it was sold by a Houston JANOME dealer. All other used machines I purchased from local dealer. Any future used machines I will get from a dealer. I sort of trust Ebay, but I don't trust any of the shippers. Any Craigslist items, not machines, I meet the seller at our police department for the exchange.