Benchmade generally makes a pre-production run of 1000 knives, and recently began acknowledging this (why they didn't before, I have no clue in England) by marking 575/1000, etc. The First Production runs are supposedly 1000 knives as well, but like Mike said, I'm sure the pre-production prototypes will be the most valuable down the road. I have two pre-pro 705S's, one 710, one 880, one 140, one 145, and one 120. There are often subtle differences between the pre-pro's and the regular production pieces; the most obvious to me are the G10 spacers on the pre-pro's as compared to the Delrin spacers on most others. The pre-pro's and first pro's for that matter will likely be worth more five to ten years down the road, and to my thinking, especially when the knife is out of production altogether.
------------------
Professor
Ever notice no other candy tastes quite like Pez? Oh yeah, the BM Mini-Axis and the Rekat Carnivour are the best production folders yet (IMHO, of course)!!