Took me a while to think this one through and understand it, but got there in the end, thanks for the opportunity to do a bit of logic puzzling. Tim
(And then an edit, think I've got the better answer now!)

Buying
Name of place: Screwtop
Goods purchased: Mallet
Number purchased: 1000
Amount spent on goods: $8,000

Selling
Name of place: Timberland