i dont think the earlier '7s will bring a premium like some will, the '98 commander for instance, is very popular with collectors, but i have never seen a early '7 bring a premium, maybe because the early ones didnt have the wave and everyone wants that?
some of the early limited editions, like the I&I tanto, now they certainly bring a premium, or anything with green G10 will also bring a premium, but i havent heard of specific yrs or serial #'s doing it, maybe #1, or #007 or something, if ya just want that number,