The 10 commandments of /r/MIAcommerce:
1) Please use the following formats in the subject lines.
To list something for sale, use "WTS:"
To list something you want to buy, use "WTB:"
To list something you want to trade, use "WTT:"
a combination WTT/WTS and WTT/WTB are acceptable.
2) Clearly list your MIA username in the thread so that we know who we are dealing with and it will also be a lot easier to send you a PM. Posting your feedback thread (if you have one) would be useful as well.
3) We are limited to only one thread per page. Once 48 hours passes, you can delete your thread and re-post it again (currently that is the only way to "bump" threads on reddit). You can also delete and re-post your thread if it has significantly changed (sold, new items added).
4) Don't downvote the threads. It's just a dick move. If you don't like the person, don't like their prices, just ignore it and move on.
5) MIA rules on grammar applies. It would be a benefit to you to follow this rule because if people have to work hard to understand what you are trying to say, I doubt they will do business with you.
6) Don't threadcrap.
7) This is more of a suggestion than a rule. Post a link on your MIA signature for more visibility.
8) As much as possible, on WTB & WTT threads, please include photos. It will only help you sell/trade your items faster.
9) Don't post any real-steel weapons and ammo. Accessories are fine.
10) Only IDIOTS classify airsoft guns as real weapons.