gaz coilover rebuild cost

[lolsteve]

Sprayed the "non broken" one today with lots of penetrating fluid but still no luck getting them to unstick but no luck

Is it unreasonable that I want to ask the seller for some money back? Or is this my fault for buying second hand?
Tried to get the car tracked today as it's feeling a bit unstable and the guy said it's not the tracking but the coilovers causing it as they're too stiff to conform to the road? Is he chatting bollox
Also car still feels a bit bouncy still with the lowering springs/shocks on the rear not as much as before but more so than before the lowering springs but not as crashy as the lowering springs on the front....god I'm flked off with it all right now

Don't really care how they look just want the car to handle..decently