Ebay shipping is too cheap?

When I shipped my PS3 (yesterday) The first thing Ebay shipping showed me was cost of a flat rate envelope? Oh...and they took 12.55% commission...$25! So the guy sends almost $194 (for some reason???) , they take 12.55% of that (not the purchase price) and deduct the $17 shipping cost I had bought through them. I still made money off something I found collecting dust in my garage, but what a racket! But I had no bites on craigs or facebook market so.....Eagle crank vendor on Ebay shipped my forged crank for $11.99.