if you have the stock parts, just de-mod all your aftermarket stuff and sell that.

I don't think i would sell to a junkyard right off the bat. I would put the car up for sale as being parted out, and see what people want off it such as body parts, seats, etc. I can almost guarantee you that you can earn more money selling the seats and body parts than you would at the junkyard. Yards only give like $100-$300 for cars