Yes they are rather OP, but not as extremely as you might think. Sure you can skip a little bit of Tech but they dont have THAT much material even if it seems like a ton.
You can always disable them in the Configs, or just decrease the probability of them (by increasing the probability number since 1 = always, 2 = 50%, 3 = 33% 4 = 25% etc).
Also what the fuck, are you sure its 80K worth of STEEL?!?! And not 80K worth of whatever Stone the thing was made of?