Are prices random or fixed?
Solution 1:
The prices are random within a weighted range. That is, scraps, for example, can vary between $4-$9 (exact numbers are unknown to me), but it might favor $6, and as such, you will be most likely, but not guaranteed, to see prices at $6 or close to that on scraps. I have yet to determine myself whether it is based in any degree on the availability of the goods.