I have 3 selling ids, one of them with a $49.99 store which has a very small decrease in fvfs. My other 2 are non store ids. That means I get 280 free listings a month and I can tell you that my overall fees across the 3 ids are considerably less than when I was paying 20c per store listing and 50c for non store items, I might add that the number of items I am selling and the price they are selling for at auction is about the same but my total profit is higher

Nobody forces you to use ebay so if you don't like their prices shop elsewhere just as you would if Coles sold things at double the price of Woolies...