@michelle2702
Are you trying to purchase on the UK site? I ask because you are currently posting on the US site.
Is your seller new? It is possible that your seller has not set things up correctly to accept UK payments, particularly if your seller is not in the UK.
There is currently a thread at the top of the eBay UK Technical discussion board about payment problems that may also be relevant:
https://community.ebay.co.uk/t5/Technical-Issues/bd-p/Tech
