Nope, turn tail and run!
Reason-
Chryslers are noterious for bad quality. EVERY chrysler brand (jeep, dodge, chrysler) were on the top 5 list for worst, low quality Cars.
The car itself is decent powered, (ive driven one at highspeed), of course lets talk reasonable now. Gas isnt getting cheaper and the 300 isnt the most efficient thing out there. Since gas should finish this year around 4~$5 driving a giant heavy car isnt smart. your gas tank fill ups will be about 50~60$ (ouch) and your driving average will be about 15~25mpg maximum, (unless you drive suuuper slow) which means you'll likely use a gallon or more daily in gas. Also Chrysler already introduced the 2011 year 300 which means the 300 is already outdated in style and features.
My personal experience with one, I thought the interior was a terrible plastic mess. That cheap dollar store looking luxury clock in the dash was hiliarious. Its basically the poor mans Bently with emphasis on the poorman. lol
Seriously there are much better reliable cars with better power, better fuel economy and better features. I suggest Camry, accord.
Dont buy any used cars with over 60k mileage i would even say nothing over 35k. Nothing over 3years old, ( you dont want to inherit someones elses junk car).
Dont be fooled by clean cars. they can hide nasty secrets. DOnt buy 300 buy a better quality car, maybe even a Ford Fusion or something like that, never chryslers.