As far as e-bay, they have a dispute department. My DD just had to use them and got a full refund for a purchase she made through PayPal. Seller never sent merchandise, never answered the many e-mails my DD sent, and when DD posted a negative remark, within moments was contacted by seller stating they had been in hospital. Told DD to check their store and sure enough, they were doing much business with other folks while in the hospital. DD wrote all this to the dispute dept. and it was taken care of.
Don't know where you bought from this person, but never ever send a check or cash. MO or PayPal. When they receive your check, they can then go to other places on the Web and get the info they need to do Identity theft. If you have never had it happen, you don't want it to. Bad stuff.
I refuse to do business on the Web unless they take PayPal. Have never had a problem in over 3 years of buying.