More rules. Grr.

1) Follow Terms of Service.
Of course, not allowed on Gaia, much less on here.

2) You may beg, but don't go too far.
If you're asking someone for a donation, you can beg to a certain point, but don't go PMing them and commenting them for it. Try keeping it moderate and inside the topic.

3) Don't sell something other than what you list.
If someone wants to buy something from you and you say "okay", you have to give them that item. Don't substitute it for something else.

That's all there really is (luckily there isn't much for this... I think). More rules might come along as they need too. Good luck!