How to mark your order paid in eBay:
Title: An item that isn't appearing as paid in My eBay

  If you already paid for the item but it doesn't appear as paid in My
  eBay, don't worry. If the seller has acknowledged  receiving payment
  from you, there's no problem.

  You can correct the status. Just follow these steps:

  1. On  My  eBay, click the Activity tab, then the  "Won"  link under
  "Buy."

  2. Find  the  item you paid for. On the right side,  click  the blue
  triangle labelled "Take action."

  3. From the pull-down menu, you can select "Mark as payment sent" or
  "PayPal" to confirm payment.