Note, everybody, that mechanical keyboards are not
17th century tulips or 1990s beanie babies. For the most part, all the used old keyboards we know and love sell for a tiny fraction of their original value. I’ve bought several old broken laptops for <$50 each that originally sold for $5000+ adjusted for inflation, and several discrete keyboards for $20–50 that originally cost at least $600–800 adjusted for inflation.
We live in a time where (happily? sadly?) there’s a huge glut of 20-year-old mechanical keyboards, because tens of millions of them were produced, they don’t easily break or wear out, and the market for them is a tiny niche, because most people would just as soon use a $10 keyboard or whatever scissor switch thing came with their computer. Unicomp sells their keyboards for a fraction of the price IBM used to sell Model Ms for in 1990 (~$80–100 compared to inflation adjusted $350+), because that is (presumably) the profit maximizing price for them.
The prices for most Model Fs today ($50–150) are
incredibly low compared to the original cost of producing them and original prices, and when considering that they are basically indestructible and should last decades. Any “enthusiast” who isn’t homeless and starving can relatively easily afford to buy a Model F XT, AT, or F122 if they really want one. A poor enthusiast doesn’t need an unsaver with APL keycaps.
There are a few rare and desirable types of keyboards, like 4704 banking boards, unsavers, Model M15s, Cherry MX-5000s, FingerWorks Touchstreams, DataHands, etc., whose prices are understandably higher. If these reach $500, $1000, or $2000, it’s not some criminal conspiracy to defraud the hapless “enthusiast”. [And likewise if they sit at that price on ebay not selling for 6 months, that indicates the seller has priced them too high for the market.]