2003 with 53,000 miles Silver on Black, 100% stock, new KUHMO tires (are these good?) No extra no whistles (no rear deck spoiler or front lip which I wanted)

seller is really motivated (called and email me few times this weekend)

listed asking price from seller $19,000. Wants for me to make an offer

Is it insulting to offer $18,000????? Is that worth it?