Repair Cost Mechanics

How does game calculate weapons/armors costs, repair costs, and how upgrades affects these costs

Note

I verified these formulas on Veteran difficulty in 1.0.3 patch

Item Cost

You can see item cost by hovering mouse over the item. Loaded ammo affects cost of the weapon, as well as attachments.

Every weapon/armor has its base cost - cost of 100% pristine item without any upgrades.

Item with 0% durability left will cost: BasePrice * 0.1
Price decreases linearly. Cost of upgrades simply adds to the item total price, durability doesn't affect this. So:

ItemCost = BasePrice * 0.1 + TotalUpgradesCost + BasePrice * 0.9 * PercentsLeft / 100

Example: I have ZUBR-19 with 58% left. Its base price is 20,000. Cost of upgrades 74,125
ItemCost = 20,000 * 0.1 + 74,125 + 20,000 * 0.9 * 0.58 = 86,565

Repair Cost

Game has 2 static coefficients: one of item base cost, second for upgrades cost. To simplify formula I introduce new value:
WearLevel = (100 - PercentsLeft) / 100

And now:
RepairCost = WearLevel * BasePrice / 1.9 + WearLevel * TotalUpgradesCost * 0.1

This formula was tested for green mechanic. If mechanic is white for you cost is bigger (in my case it was +33%).

Example:
I have Diamond Exoskeleton with 81% durability left. Its base price is 68,000. Cost of my upgrades is 122,000. Now:
WearLevel = (100 - 81) / 100 = 0.19
RepairCost = 0.19 * 68,000 / 1.9 + 0.19 * 122,000* 0.1 = 9,118

Сonclusions

Don't add useless upgrades. Every upgrade you add increases full repair cost of this item (from 0% to 100%) by 10% of upgrade cost.

[refrenates]

Technician Multitool on Cordon - the lowest price for repairs

[myhv]

Just slap it with something like https://www.nexusmods.com/stalker2heartofchornobyl/mods/351

[sunflower]

Shit gun upgrades cost much less. You still can put upgrades, but they will not do much

[cd0m]

jesus that's fucking dumb so upgrades are even more useless you can't even boost a shit gun into something neat