What chain? I would think they are still ok but if you did want to renew your ride a quick check at RockAuto shows very good quality KYB complete struts for 124 each front side and the rear shocks 60 each. 2 or 3 hours labor maximum and considering the struts are preassembled -- I would say closer to 2 hours total. I would think it could be done for roughly half what you were quoted.
The part prices I was looking at are in Cdn $, take a further 30% off for US $s