This will work. You wont lose any money either. What you do is find the unid that equals ranarr weed. Then you buy ALL unids for 1k each. After that u see which unids stack on that 1 ranarr unid you have. You ID those but just sell ALL the other unids you bought for 1k a peice. So you make money off the ranarr weeds but dont lose for buying much cheaper herbs.