Items from The Merchant should have base prices and weighting per item type

[theastropath]

The current implementation of item selection for The Merchant gives equal odds to all types of items, and the prices of those items are all fixed within a single range.

It would be nice if each type of item could be weighted so (for example) medkits and biocells appeared most frequently, with an occasional super-rare Thermoptic Camo. Those medkits and biocells could have a much lower base price than the thermoptic camo, which would maybe make The Merchant a little more useful, since I feel like his prices are often too high for some types of items (like darts or prod chargers).

Prices would be randomized from their base price in some range (0.75 to 1.5 times?) and the price could be presented as a sale amount (which doubles as "how good of a deal is this particular medkit?" info)

Theoretically on top of that, there could be very low odds of a bigger sale (50% or 75% off or something). That's a bit more of a stretch maybe, but might be a fun idea? Would maybe incentivize not murdering him immediately.

[MQDuck]

Grenades or a LAW might be good options as well. Could even offer weapons themselves, which might be useful if you have a bunch of plasma ammo weighing you down. Maybe weapon mods, but maybe a permanent upgrade is too much.