Problem with Paid the Item

[spydr08]

Hi,  I need solve the problem.

The Seller send me an offer for an item but when i go to pay  i get the following message:

"This seller didn't include shipping costs to your location. Please request total to ask the seller for shipping costs or change your address"

Item location:

Uckfield, United Kingdom

Allways paid on Ebay But I do not know how I can solve this, Ebay sende this message:

"Pay within 2 days to avoid an UNPAID item case against you"

I do not want to open a case for not paying when the problem is not mine  I'm trying to pay it but that message always appears 

"This seller didn't include shipping costs to your location. Please request total to ask the seller for shipping costs or change your address" 

my shipping address is un USA...

Regards