Bitcoin Escrow integrated

Hi, I basically want a bitcoin escrow software where sellers on my forum can use for buyers to have secure transactions. Also i would like it to have a fee that is paid into my bitcoin address once the transaction is successful. Example: Seller is selling Item1 for $30. Buyer wants to buy Item1. Seller does escrow and $30 is converted to the live rate of Bitcoin ($600). Escrow is now open and transaction is [url removed, login to view] to be funded to the transaction. Buyer needs to send [url removed, login to view] to the escrow bitcoin address. Once that has been done the seller will then send Item1 to the buyer. Once the buyer has received the item he will then click release funds. At this point the seller receives [url removed, login to view] (5% fee). All the seller need to input to the escrow to make it live is his bitcoin address, Item name and the amount in USD/GBP/EUR. Minimum Transaction $20.