How much is this bundle worth?

I’m trying to build a 5.1 system for a small living room to get rid of my current soundbar. I ran across this bundle on marketplace. Seller is asking $1,000 dollars. How much do you think these pieces are worth paying? I offered $600 but he countered with $800 firm. Thoughts?

R-51 M (pair) RP-450 C (center) R-820 F (pair) R-120 W (sub)