I am trying to figure out what a 1987, DE11xxx SN first year produced Delta Elite is worth, in really nice condition, except that the frame is blued as it would be in 87, but the slide is stainless. I assume that Colt replaced it when they were having the issues of the early DE's cracking slides, from high pressure rounds. Th slide appears from the roll marks, and the cocking serrations, to be 3rd or 4th year. Does anyone have any idea what this thing would be worth? Do blued DE slides ever come around? Probably not.