When you go to buy scrap with fert, you cant buy anymore than 300 at a time...if you try to go above 300 it will not take fert or give scrap when this happens it will also remove the Edit button from the window (for admins) and the edit button will not come back until you close out the trader and reopen. Also making changes in the EDIT for this makes no changes.

Also the base sale of having 1 in the buy field shows 2 fert for 2 scrap. That transaction completes fine. If you raise the buy field to a higher value and click buy you do not get the amount of scrap the screen says you should. EX: if you put 10 in the buy field it says you should get 20 scrap but you only get 16. if you put in 100 it says you should get 200 scrap but you only get 165. So to get the correct value you must buy 1 at a time.

The issue where the amount of scrap you receive depends on how many transactions you are doing at once is also the vanilla behavior since the December force wipe. It happens because the dynamic "pricing" is applied after accounting for how many of the item you want to buy/sell. The client also doesn't estimate the total correctly.