You can move this thread on the Currency Exchange board
https://bitcointalk.org/index.php?board=53.0 just click the "move" link on the bottom-left of your screen and choose the board I mentioned above.
If you have any tips on how to show legitimacy it would be helpful
I guess that will be for the buyers to asked if they will make a transaction with you furthermore I can add you a tip to make your service more trusted in a sense is if you're willing to trade to buyers with an escrow-guaranteed transactions.
There are many trusted escrows you can find here I can vouch for krogothmanhattan or minerjones escrow service. To buyers do your own due diligence to trade safely with the use of escrow especially to new users just popping out to sell something.
