You might as well just post on craigslist or fb marketplace.. You'll get a larger local audience (especially if its something that you cant ship). There is also a few groups on fb that are strictly related to ice fishing in Montana and things appear to sell quickly in them.
I personally think its a silly rule that you'd have to pay to sell things on a forum like this. I understand its a way to support the forum, but no other forum I've been apart of does it this way.
Good luck with your sale!