It is not against the rules but rule 23 covers selling items on the THF, rule 23 in the location Fireman pointed out;
23. Post your items or services for sale or trade in the classifieds forums at: http://texashuntingforum.com/forum/ubbthreads.php/forums/2/1/Trading_Post_%E2%80%93_Swap_%E2%80%93_Classifi. Make sure you read the rules for posting classifieds at: http://texashuntingforum.com/forum/ubbth..._PO#Post6605808
Do not post classifieds in any of the other forums.
Rule 1 in the classifieds
1. A minimum of 100 posts and 6 months as a contributing member is required to create and reply to threads in the classifieds (PM a moderator to request access), or you can bypass the 100 post minimum by purchasing a Supporting Membership (http://www.texashuntingforum.com/forum/u...ips#Post1791594
). Violations of the classifieds rules may result in your privileges be terminated or account closed. If you spam your way to 100 posts, you will have to wait 6 months to get classifieds access or buy a membership.