EBay Pay it into your Bank. Click Payments on the Hub from the left hand list. This will show each transaction whether Pending, on Hold or has been Processed.
You really shouldn't Post something of that value as a Large Letter. Could easily get lost in the Post you would then have to Fully Refund your Buyer. Any Item you sell for over £50.00 should be sent by Royal Mail Special delivery to be fully covered against Loss or Damage in Transit.
