Well, enabling mass-buying (with a little html-editing) for 9mm ammo is enough (that is, if control/prosperity are at the normal level) and then selling at Hamah Market (the 9mm ammo can be bought at any location). While power cores also (with normal market prices) offer a profit via buying and selling, the stockpile is limited and there is only a profit, if the power core stockpile (for buying) is 1000+. No need for expensive workshops
- I still only have exactly one. Also Knives and Crossbow can offer a profit via buying and selling, if the market stockpile is below 5000 (allthough buying of knives at Imperials is advised and crossbows might also be better purchased at imperials, eventhough also Waltons can offer the same price (without html editing), if you know how). And if one sells 500 of an item, when the market stockpile is 4999, then you will still get the better price for all 500 items.