As almost everyone states you clearly have promoted your listing, and probably promoted at the Ebay recommended rate. You are paying that promotion fee on top of the FVF and on the cost of the item, the shipping and the sales tax.
For a scarce item, promoting at the Ebay recommended rate is only justified if you are looking for improved visibility when a buyer is using a vague search.
It is unlikely that a buyer who is doing a vague search will pay what you charged for the item, so if you chose to promote, it should have been at a low rate, like 2%.
Your recent Ebay sell-through is remarkable. 66%. If you had only 3 items, a toy show would be unfeasible, and probably just as expensive.
Many sellers have learned to ignore all Ebay recommendations, they know nothing about the business YOU are in. They only know about their business which is collecting fees from sellers.
Consider whether your items are rare enough to not need any promotion. If you have any doubt, do not promote until after you have seen whether you are getting organic views and sales.
I recently promoted some listings and saw no better results with them than without promoting. Not surprising since they were suitably obscure items requiring an advanced collector to make a sale.
