Example prices

The pricing of room212 is meant to cover both exhibition style use, and use as a shop:

Moral of the story: if you don't sell anything and just use it as an exhibition space, you just pay the minimum rate. If you sell a lot, you will pay 5%.

Be sensible about commissions. If they are due to room212, you owe me 5%, if they were going to ask you anyway, you don't. If you get a commission 2 months afterwards that is due to room212, you pay 5%.