Thanks for the feedback!
With the table areas I'll try making it more obvious by adding an outlined '?' if there's no item there yet. Freezes are due to bad proc gen, and not doing pre compilation of shaders; should be much better next time. Then with buying from customers, it's usually worth it but I can see adding a way to decline a customer outright, along with other ideas I have. Though, I should say that hitting them with your shoe until they get the clue is quite entertaining.