How about.
"I buy and sell on ebay but it costs me about 25% to sell there and I think it is excessive but there are few other sites besides RCU. "

I have bought and sold hundreds of items on ebay but now I hate doing it because they charge so much.
Listing fees Plus final value fees Plus paypal fees = a lot of my hard earned money.
And I maintain 100% positive feedback. But it only takes one or two negatives to blow my percentage out of the water and cost me a bunch more money so it is much easier to take advantage of a small seller who is worried about his feedback while a big seller can take a few hits and his volume will make up for it. And now that all buyers are perfect what protection does a small seller have? I can block a bidder with negatives but they won't have negatives unless they sold something? The customer is always right even when they are wrong because they didn't read the item description?

Sorry, sore subject. [&o]