I had a very nice experience with a US seller.

Purchased a Native American silver bracelet & barette for my daughter.

All arrived in time but the bracelet was not the same as listed.

Emailed the seller telling her so - she emailed back asking for photos of the bracelet sent.

Had just finished emailing the photos when my daughter handed me the phone saying it was a call from Kansas.

We spoke for about a half hour - mainly about the trials of eBay etc but she offered to send any bracelet to replace the wrong without the need to send the other back.

Well, fairer than that I could not get so purchased another - my daughter chose another.

Both arrived in due time - gorgeous.

The seller during her lengthy conversation directed me to an interesting site - some others may be interested.

http://www.ecommercebytes.com

Lots of info - much the same going on in the US as here.