(If this is against any forum rules, my apologies and please have a mod delete the post!)
Friendly neighborhood mod checking in to tell you that this is, in fact,
not against the rules as far as I can see. A quick search of the Guidelines For Forum Conduct (which took entirely too long for me to find) has nothing on soliciting the sale of personally owned items via this site. The only things prohibited by the letter of the guidelines is advertisement, farming, phishing, and things of that nature. Now, it could conceivably fall under the advertisement clause for someone else's interpretation, mind you. Until that happens, however, this thread gets an unofficial "No need to delete" stamp from me.