You should modify your thread and add information about the escrow arrangements. There are several highly trusted and reputable escrow providers on this site who can hold coins while trades are completed.

The idea is for people here to feel protected when dealing with you, especially because you have a rather new account. A trusted escrow can reassure sellers that they have your bitcoins in hand. Sellers from anywhere in the US can then overnight their stuff to you, you then appraise it and instruct escrow to release a certain amount of bitcoins to the seller.

Offering escrow protection will encourage reluctant sellers to come forward and offer something to sell.