For me, it depends on what you include in the 'fake' category. If you just mean those chinese knockoffs that people try to pawn off as the real deal to scam a few bucks out of people, then the answer is No. If you include all of the knockoff / homage / reproduction / copy knives that are out there, that's another thing entirely. I can think of a few examples of knives that I wouldn't buy originals of because they're prohibitively expensive, but still really like the designs.
The price tags on Randall-made knives will pretty much prevent me from ever buying one (unless I either win the lottery or I make a fortune in the Meth business), but I do really like the looks of them, so I might end up buying a Blackjack some day (which are very obviously knockoffs of the Randalls, but are much more affordable). Damn those are nice looking knives. I'd even look into Cold Steel's knockoff version of the Hackmann puukko, too, if I could find one at a decent price.
Lately, I've been looking for a decent example of this classic pattern:
I always associate this pattern with Marbles knives, but from looking around, it seems like decent examples of these Marbles knives go for huge chunks of change. There are tons of other makers from back in the day that make similar designs, though, like Kinfolks, Case, and Western, and some of these other makers seem to go un-noticed on auction sites (thus commanding lower prices). I'm totally going to look into some of these other companies if I can't find a Marbles version for a price I'm willing to pay, regardless of who the original maker of this design was.
Come to think of it, I nearly bought a knockoff Grohmann a little while ago from a custom maker (might have been someone right here on Bladeforums, but I can't remember). I own a few real Grohmanns and, although I like them and am all for small knife companies like that, their steel leaves a lot to be desired. I wanted something that would hold an edge for a reasonable length of time. If you want something that looks like a Grohmann but aren't happy with Grohmann's steel choice, your only option is to look at customs.
So, yeah, I can definitely think of some situations where I'd buy a knockoff/reproduction/homage knife. Like I said, that doesn't include the cheap chinese fakes being marketed as the real deal, but it does include a whole lot of American makers who borrow a suspicious amount of designs from other makers...