Benchmade 670 Prototype

J

James21254

Joined
Mar 9, 2014
Messages
34
Can any of y'all tell me anything about this knife??? How much it's worth, etc. I found it in my safe, no box or papers... I must've gotten it before I left for Afghanistan... I thought I'd ask the experts on here... Y'all always amaze me on how much y'all know!!! The knife is in perfect shape!!!

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The "Exchange" section is for buying, selling, and trading only. Discussions about knives, what they are worth, how much a good asking price is, or getting information otherwise is better suited for other sections. I've moved this from the sales section as you don't have any details necessary to make it a sales ad.

That knife is worth about $120-$150 if you have the original box, baggie, and papers that came with it. First production Benchmades do not fetch a higher price on average unless sold to a person that specifically collect "First Production" pieces. It's a very nice knife and in a great size for carrying daily. Unfortunately it wasn't one of the fast sellers so it was discontinued. Good luck.
 
It doesn't have much of a collector's value because it is not a very popular model that collectors commonly look for, and I would guess around $100-200 depending how bad a buyer may want it.

This was not a popular Benchmade model at all, and it gained a bad reputation because some early models had some issues with lock failures (rare frequency, but from a maker that produces knives in which lock failures are generally almost unheard of, and those stories spread fast). Additionally, it was not a very practical carry knife, and the similar 672 made the design more practical from an EDC perspective.
 
I remember contemplating buying it, but never came around to pulling the trigger. I guess combination of a liner lock, assisted opening and the weight made it less attractive.
Well I do have 672 model that pnsxyr mentioned, with D2 on the blade: so have zero regrets about not buying 670!
 
This was Benchmade's first entry into the AO market, and used a torsion bar which provided resistance by providing resistance to the back of the tang. While the knife worked, they were too fussy with the torsion bar held in place by a very small set screw. My solution to this and which makes the 670 even better, is to use the tiny provided allen wrench to remove the torsion bar; once removed it becomes a very classy manual locking liner and is worth owning.
 
I just want to thank y'all for all the responses!!! Y'all give such intellectual answers including the pros and cons, which was exactly what kind of responses that I was hoping to get!!! Thank y'all so much and God Bless y'all and you're loved ones!!!

Take Care,
James
 
If you aren't strapped for cash, it's probably worth holding for a while. In a decade, it could become a very valuable piece. Some Benchmade models that were not popular at all during the run saw a huge surge in pricing a decade or two decades after they were discontinued. It's a handsome knife for sure, even if not a prime EDC compared to other BMs.
 
I'm placing my stock with you... I was thinking of selling it, making it my EDC, giving it away, etc... But now I think it's just perfect where it is... Thank you very much for your advice!!!
 
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