Scrapyards

Scrapyards are helpful to help you to progress further in the game by giving you a certain bonus.

In Scrap Clicker 2
Currently there are two scrapyards in the game: a normal one (blank and v2, uses Scrap), a Scrapyard v3 (or beamyard, uses Steel Beams), and a Scrapyard v4 (Wrenchyard, uses Wrenches), each needing 10 clicks to level up.

Scrapyard
This Scrapyard uses Scrap as resource and makes stars cheaper at 5-9 Stars, and from x12 Stars (at 10 and x11 Stars it isn't available) evolves to Scrapyard v2, which reduces the costs of a Star (GS, Magnets and Star Fragments). Each level it gets 4 times more expensive.

Formula for cost reduction
???

Scrapyard v3
This Scrapyard is unlocked at x75 Stars (unlocked through Skill Tree) and gives +1% Magnet bonus per level, and it costs Steel Beams. The cost is equal to the level.

Note : Even though Scrapyard v2 is an actual replacement for the "basic" Scrapyard, Scrapyard v3 is a distinct one, thus it does not share level with Scrapyard v2 (which implies just keeping both afterwards).

Scrapyard v4
This Scrapyard is unlocked at x115 Stars (unlocked through Skill Tree) and gives x1.5 Brick Production (exponential), and it costs Wrenches.

The cost started as 1000 wrenches * scrapyard level per tap (10 taps per level up).

At some point this stopped and became 2744 wrenches * scrapyard level per tap.

Leaving this information here because while it is not a complete formula, it provides some guidance.

Scrapyard
This scrapyard costs Scrap, you unlock it at level 75 click barrel and gives you a bonus production of

$$(0.02 × l)%$$ extra Scrap production each time you upgrade it. It costs 2^(l-1) Scrap to upgrade it.

Golden Scrapyard
This scrapyard costs Golden Scrap, you unlock it at level 200 click barrel and gives a chance of 0.5% per level of getting Legendary Scrap while merging. The cost is the same as with the normal scrapyard.

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