This is a great deal for anyone wanting to clear out some old junk.
I have no idea when the coupon expires, so it's probably best to jump in quickly, just in case it's one made for these holidays.
I tested it by going through the process of submitting a car ad and it worked fine. Had I continued, I would have saved $49.95 if I chose the "Get Noticed!" style of ad (the other was Standard, for $29.95), so it seems to work for any type!
UPDATE: Apparently things are not completely free. Please check the comments below for details. Sorry everyone!
total junk. never trust any promo mails from Trading post. just submitted an ad with promo code & it deducted $8 from my credit card. so unprofessional