Recently I had a house fire. The company we used to remove the undamaged items threw away a 1/64 scale Mike Skinner Lowes Monte Carlo. I won this item from Racing Champions in 1998 or 1999. It was in a styrofoam container inside a cardboard box. Included was a paint sceme card, and what looked like a aerodynamics template. I believe there were only 6 of these. How do i find the value of the car

you could get a "book value" in die cast digest. but it's only subscription only.

i looked in one of my old ones, about 3 years ago, and found no listing of anything like you mentioned. add to that it's mike skinner in a lowes car. i doubt it's worth alot.
personally, i tossed out steve park, and mike skinner 1/64 cars i bought because i am selling my collection, and got tired of trying to get anyone interested. i couldn't get even $2.00 from a guy who was a skinner fan. i could give the steve park away, and i tried.