Rock bottom best/worst you can expect for operative engine 300CD oughta be $600- $800 says me. Reconnoitre these are collectible cars becoming rarer with beaucoup coupe specific parts that oughta be kept outa the crusher, specially if you've got the notso common sunroof option that makes the car worth restoring. Heck y'all could probly scarf up all 300CD's available at about $800 each and double yer money in 5 yrs.

Huck, yer no start problem is probly air in fuel system if it ran when parked one year ago. Without hesitation I'd clobber it with diesel starting fluid shot into intake manifold.