Looking to purchase a 2008 QP, GTS blk/blk. Dealer has has the car for sale since last April (2019). The PPI checked out. Started at $19.9 last april, now at $16.900 + Tax lic etc. Any thoughts on an offer? Paying cash and KBB says $16.9 is high. Thinking $15.5. Any thoughts and insight would be appreciated.