I am confused...I thought a shop meant you were a business seller.
However...as a private seller the help page says "Private sellers get an allocation of 300 free listings each month (or, 400 free listings each month if you have an eBay shop subscription "..."For a monthly cost of £19.99, you'll receive an additional 100 free listings which include the special duration listing upgrade (so, 400 free listings each month)." However when I click on the link to eBay Shop subscription the table starts with a basic shop at £27.00 and 250 listings.
Clarification required.