Not a particularly good troll attempt, but a good opportunity to recap a few basics.
1. Very generally speaking, quality costs money (directly or indirectly). Always. Therefore, a high-quality product won't be cheap.
2. However, since there isn't an upper limit on markup and there may be multiple other factors involved (e.g. economy of scale), the inverse conclusion is invalid. I think we don't do too bad a job in checking quality indicators and performance around here. That's reasonably straightforward, keyboards aren't audio amplifiers after all.
3. I'd think the vast majority of folks here basically are after a "good, dependable keyboard" that suited their needs (and budget), or at least were at some point. There is plenty of overpriced gaming trash on the market which is quite simply optimized for anything but key input, so what you get is backlighting, a display and what have you, but key feel and durability may not even match a basic $10 job. If it turns out that your ideal keyboard is, say, a HHKB and you have the 250 bucks, why not? Of course buying one without doing proper research would be foolish. I'd say a lot of folks walk away with a choice that is good bang for the buck here - Unicomps, Cherry G80s (on this side of the pond), Filcos, Leopolds, whatever.
4. Even if you do get into collecting, it is a relatively inexpensive hobby absolutely speaking. (Cars? Flying? Golf?) Nobody said you have to amass Optimus Maximus', µTrons or G80-5000s. I've had some fairly nice 1€ finds on the 'bay, too. In fact, looking out for those old obscure 'boards and actually getting something interesting and documenting it is part of the fun.
A few random examples:
If I had the choice between a new netbook and a used, but refurb'd and upgraded older X series Thinkpad at a similar price, what would I get? The Thinkpad, no doubt. It's not just the "nipple", the whole machine is pro-grade and cost an arn and a leg new. I would expect getting good use out of it for years to come, with good spares availability. Buying one new? Maybe not, but I'm not a business with money to throw around.
Why do people collect fancy mechanical watches that cost quite a bit if a $30 quartz job would do better in timekeeping and shock resistance? It's the fascination of getting good performance out of this obsolete technology. Much like hunting for those exotic signals on shortwave is still fun in this Internet age, assuming you have a somewhat RFI-free listening spot or antenna location. Those into technology can also collect implementation details for various functions and marvel at the solutions people have come up with over the years. (The areas of frequency generation and frequency readout in receivers alone have a lot of cool stuff to offer.)
As opposed to mechanical watches, mechanical keyboards aren't even technically outdated. High-quality keyboards in general just went out of fashion in the 1990s due to price pressure. Computers in general got a lot cheaper, so associated components also had to.
Nowadays, however, a PC is a commodity item that begs to be personalized. Just like people may choose to put in the latest and most power-hungry graphics card or stick to a quiet passively cooled job, or two big monitors vs. a single smaller one, they also have choice among input devices. And that's a good thing.
