^ Exactly.
I guess the people buying small amounts of switches, even in groups of 104, have no choice but to buy them at whatever price they can get. Particularly seeing as how I'd wager its rarely something they're doing because it's necessary (i.e. replacing a couple of broken switches on a dropped keyboard). Its probably more likely that they're modding something (i.e. Ergo Clears, etc. etc.). Because the quality of mechanical keyboards on the whole are so good that they don't break (except for extreme circumstances), I guess there's not much of a need for a spare parts market. Thats half of the reason we all love them so much, and don't mind spending $100++ on something most people spend nothing on, is because they're (generally) an extremely high-quality product.
Think about it this way, if I'd bought a DAS Keyboard for my first keyboard instead of a Filco (which I almost did), I'd have ended up hating the shiny coating and tried to sell it prettymuch immediately. I know a lot of people are pretty skeptical about buying used electronics (myself included) and things like this often tend to depreciate heaps as soon as they come out of their box. If I'm only going to get $60 for the keyboard, why not sell the switches individually for 80c each or so and make ~$80 instead (plus what you can get for the keycaps)?
Personally I'm a hoarder, so I probably would have re-purposed, re-gifted or painted the DAS, rather than trying to sell it, but the above was more for an example. You get the idea, though.