https://www.google.com/?gws_rd=ssl#q...hermostat+cost
seems like the price is the huge part. I would check with rock auto. Got a pair of rear struts for my Sentra delivered to my door for $48. Dealership would have been $3-500 +.
Did the labor myself with a $14.95 harbor freight spring compressor, saved me about $100 per hour of my labor and that's tax free money in my pocket, otherwise spent.
regards
mech