Speak to a Vendor about an ESCROW Payment.
It might take time to find a Vendor willing to accept.
The Terms of the sale gives the Buyer the option to assess the goods are as per advertised for 30 Days following receipt.
A Buyer can agree to confirm they will have the monies released to the Vendor, within a shorter period that 30 Days, i.e, 3-7 Days following receipt.
When purchasing through Ebay or Paypal, your purchases are protected if the goods are not as per the advertised condition.
Vendor's are much more careful around Payment Services via PP and Ebay, as their are a selection of Buyers who are very content with abusing their privilege offered from using these services, and every so often a unwanted sale experience is to be endured.
It is a Gamble, be gathered in a investigation, do not get too eager to own the item of interest.
Sticking close to the term 'Caveat Emptor' is always ones friend.