Manufacturer's Retail Selling Price has a dubious relationship to quality control - or any relationship at all between two knives and their design. It's strictly a marketing ploy successfully used to imply that if you do spend the money, you are getting an exclusive and overbuilt item.
No doubt the Sebenza has quality - and no doubt that any other titanium framelock isn't one. But they might be just as good, and more useful to the individual. After all is said and done, a construction standard of extreme tolerances really doesn't contribute much to the chore of simply cutting - that's controlled by steel composition, heat treat, and edge geometry. Sebenza owners haven't been universal in their praise.
Really, no knife is an identical substitute for another. Even the authorized factory copies can be different than the handmade originals. The Buck/ Mayo TNT comes to mind. Owners of both have pointed out the difference. Whether an original is worth double or more isn't the point - it's that an original has the maker's hands on enforcement of his vision. The Buck is that vision transferred to many hands in a mass production factory. Subtle details get lost - like the difference between a 366 NASCAR ready engine and a crate motor copy. The copy is always 10% or more down on power. Subtle details - and the makers don't always tell all their secrets.
So, buying a Benchmade "Sebenza" won't ever get the full meal deal, any more than a McDonalds dollar cheeseburger is the same as a Hardee's Thickburger. Titanium framelocks are a different class of knife and do some things very well - but unless it's the next one off the maker's bench, are not a substitute for something else.