Used Mytek products so seldom listed on Audiogon...

Is it just me, or do you almost never see a used but current model Mytek DAC listed for sale here? You'll see the discontinued ones...rarely...but the listings for current product are for new from online dealer, Jaguar Audio.

I accept that they are good and a good value, especially if you use all the myriad features, but why so few used ones when we all know audiophiles that change and upgrade at the drop of a hat?