I wouldn't think they'd add any value unless it was number 1 and the right model. If I lucked up and received a number 1, I'd have to admit it be hard for me to use. I prefer mine unmarked, but I can do either. I'd guess a #1 marked 710 these days would go for a pretty penny to the right collector.
Oh yeah I remember reading that somewhere. Thanks for the clarification. Hmm well how about a #1 marked Infidel. That'd be worth a ton. Or even a #1 marked Griptillian.As far as i know, benchmade marked all of their 710 first production run with 1/1000. They started to mark them with ascending numbers a few years later.
...does the first production runs really add any value to the knife?