How much is this calcium reactor worth?

[gemini aquarius(t)]

https://offerup.co/d7wtNZSe7ab

I got it from a client and it's overkill for my tank. I threw a price up of 600 but I'm hoping for some real opinions

 

[dadummy]

it's worth whatever some one is willing to pay

the carbons doser alone new is 400

vertex reactor 400

ph controller 130

co2 tank 100

 

[gemini aquarius(t)]

Thank you for the numbers! That’s really helpful