I have done about $25k of business in the past month on Bitmit and with direct buyers. I can easily handle fairly large requests of up to $2k per transaction and $5k per day.
I charge transaction fees of 2% to direct buyers and 3.5-5% on Bitmit depending on the size of the transaction (Bitmit takes 2%).
I do not offer escrow. My Bitmit feedback speaks for itself.
https://www.bitmit.net/en/item/26015-amazon-gift-cards-5-btc-worth#Thanks for your consideration. Any questions, PM or email (email preferred).