For thieving stalls you work all your way up to 90 to get the scim stall and you get random scimmys. I think it would be an always d scim theft but make d scims 50k when sold in shop instead of 100k so its not 2.8m per inv and 50k to make it 1.4m per inv both good money both ideas up to you.
suggestion - Marazon.