Selling things on FT is prohibited.
http://www.flyertalk.com/help/rules.php#q71
Commercial and Charitable Messages
a. Commercial posts. Posts containing promotional messages for commercial products or services - including but not limited to Internet sites, business advertisements and solicitations to donate miles or points – are prohibited and will be removed. FlyerTalk is not a marketplace and nothing is to be offered for sale or conditioned on an exchange of money or barter. Nothing in this rule is intended to prohibit exchange of travel coupons as allowed by the rules of Coupon Connection. If you spot a commercial post, please report it.