Based on prices I've seen lately...admittedly only asking prices...$40K seems high/average for a 40K mile example.
If it was me, I'd offer 36K and pay up to 38K IF the following were true:
-clear title (obviously)
-no CELs or other idiot lights (obviously)
-color combination I wanted.
-reasonably complete maintenance history documentation
-wearables (tb/wp hoses, tires, etc. etc.) had been taken care of base on TIME (since mileage is so low).
-cosmetically near perfect with minimal wear, original paint, no scratches, minimal stone chips, no dents or dimples. Interior near perfect with maybe some wear on driver's side seat bolster but no bubbling or scratches in center console and door switch trim, no dash trim crack at the windshield, EVERYTHING working.
-updates/fixes already done for power windows, CCU, audio head unit and speakers, etc.
-ALL OEM, with spare, tools, etc in place, or with original OEM parts included where aftermarket installed. Exception might be exhaust system.
I would go several thousand higher if EVERYTHING was PERFECT (down to a spotless undercarriage) OR for Sebring silver with ivory interior (only 9 sold in US)
Add maybe 5K for a Comptech supercharger, more if it was dealer-installed prior to first sale. Same for Comptech "performance option": dealer-installed headers, exhaust, and maybe more.
Of course that's just me and that's how I perceive value. Others might pay a premium for aftermarket parts they would want on the car anyway, especially high-buck items like bbk, high end coilovers, turbo, etc.