Advice on second hand PC

[xTommy92]

I have been offered £400 for a second hand system. Does this seem reasonable or should I throw an offer his way?
As follows:
NZXT White Case
Ryzen 5 2600x
Nvidia RTX 2070 Super
Hyper X RAM (24gb)
2TB HDD
Aqorus Motherboard

I play 1080p @144hz, newer releases (tuned settings) aswell as League of Legends, Overwatch 2.

 

[xTommy92]

Thanks for the help guys, I am going from a MSI Laptop with an I7 6820k, GTX1070 and 32gb RAM.
What do you think the performance gains would be like? I will also be looking to overclock the system.