I just took a look on eBay. Wow. Prices for the MX have gone through the roof. You know, this is a trend I've been noticing for many cameras that were built in the late 1970s to 1980s. I sure am glad I bought my cameras when I did.
I bought my MX at auction at Goodwill's auction site: shopgoodwill.com. Back when I bought mine a couple years ago, prices were still cheap. I doubt I paid more than $40 for mine. But you know, this acceleration in prices is a trend I'm also seeing at Goodwill's site. I'm astounded when I see things like a Canon AE-1 with normal lens get bidded up to $80 or $90. Geez. Used to be you could find really good deals there. Now, not so much anymore. Prices on 70s classics, like the Canon FTb, Nikon's Nikkormats, or Minolta SRT-101s are often still quite low. Which is a good thing, I think, because I like those old 70s classics. I can't include the Pentax K1000 in that group, though, because I frequently see it getting bid up to fairly high numbers.
I just took a look over at shopgoodwill.com. There are several Pentax K1000s that have gotten bid up to $75-85. They also have two MXes there. One with 9 hours left on the clock that comes with a 50/2 and an aftermarket zoom, plus filters, etc. for $39. That's not bad. Chances are the auction will close at quite a bit higher than that, though. Another MX with a 50/1.7 and 28/2.8 plus an AF160 flash is sitting at $82.50 with three days to go. That's not all that bad of a price, though, because of the 28mm being part of the package. But still, the prices I'm seeing there now are reflecting this overall trend of rapidly increasing prices in manual focus film gear that was highly regarded in the 70s and 80s.