Damn you're bringing back foggy memories of the "new member for sale" forum. Keep in mind that my recollection is probably a bit foggy on this:
Back before we moved to the Scout forum in Aug 2014 or so, members here weren't allowed to sell items until they'd accrued a minimum of 100 thread posts. That worked to a degree, but guys would just post garbage everywhere to get their minimum, sell their gear, and often disappear afterwards. As a potential fix, Lowlight (the forum owner) implemented the "new member" classified system where you paid whatever fee in order to list your item. The fee was meant as a discouragement for scammers, and the separate for sale area let the rest of us know that we were largely dealing with unproven sellers.
We just moved back to this site a few weeks ago and it appears as though you may have stumbled upon an old link or something for that section. To my knowledge it doesn't still exist now that we're back "home". I believe we're back to the 100 post requirement to be active in the "P/X" area.
My my recommendation would be to go to "The Bear Pit" which is in our "Team Room" area (should be one or two down from this new member intro section). In the Bear Pit, Lowlight has a thread entitled "Punchlist for Repairs" where he is dealing with issues that have arisen with our move back to this site. Politely state your problem just as you did here and I'm sure he or one of the Moderators will be able to help you out. If for some reason you post there and don't get a reply in the thread or by PM from Lowlight or a Moderator, then (and only then) should you contact them via PM.
Tucker301 is the most visible Moderator in this part of the forum, he's easy to find in the Bear Pit, and he'll have "Moderator" or some version of that under his user name in red.
Welcome me to the Hide, and hopefully you'll stick around after you've sold your item.
