Main issue is then that the "Set price to Buy" and "Set price to Sell" for the shop owner (only the shop owner gets this anyway), should be switched around when it comes to function.
We might as well give them the exact same name as in the **Trade Order** one
**SET PRICE TO BUY** -> **SET PURCHASE PRICE** + Have it change purchase price instead of sale
**SET PRICE TO SELL** -> **SET SALE PRICE** + Have it change sale price instead of purchase.