Always use the ebay 30 day money back guarantee, it is on every listing right side
BUY WITH CONFIDENCE.
Going to paypal first runs risk of not being able to use ebay, especially as seller has to pay for return label, paypal requires buyer to pay for return. Always keep paypal as a back up.
On listings NO RETURNS is followed by SEE DETAILS. Sellers can only refuse change of mind returns, they must accept NOT AS DESCRIBED returns.
It does pay to read everything on ebay, as some sellers are quite happy to allow buyers to not understand their rights.