Not as far as collectors are concerned. Small brass rivets are a giveaway. Pallets of blade blanks have been shipped offshore for finishing. Some of them plopped into original boxes (or box copies) and claimed as legit. I just bought a new in the box sharpfinger for $36.99.
It is an original special factory order for True Value Hardware circa 1989-91. These Sharpfinger knives were made in great quantities for many years (1974-2004), so finding a very good used or even new example isn't hard if you pay attention.
"A knife in a mans hand is as precious as a diamond necklace on a womans neck" Felix Mirando
As the great Andrew Martin once said "One is glad to be of service".