You could probly get $2000 if your lucky for the dash alone, the only way to get an uncracked dash is to look high and low for one without it and thats rare enough or order one for $2000 from overseas, id either keep it or price it high as in pristine condition with a dash that isnt cracked is actually worth something then on top with only 66k on the spedo its like a dream come true for some people who like these cars to find one like that, i personally would be willing to pay 4k for a car like that, fortunally though mine has treated me well and i was able to buy a new uncracked dash, if your going to sell it id recomend putting it up on ebay so people in whats say california get a shot at it as volvo's out here go for way more then anywhere else except maybe new york.
good luck.