Most don't buy the 11900 because of the layout. They are one of the worst Cherry boards to harvest doubleshots from, as all of the fkeys, nav, numpad are R3 profile, and even the main block has less compatible keys than a MY8000. I find them to be pretty nice boards even though I am not that fond of black switch. Two of the 11900 I have picked up recently have been modded, one to clears, one to greens.
If you are just after PBT though, you can but a MY8000Lsomething for around $10 most of the time. Make sure to get a 2tone white/beige for compatible modifiers though... the newer all grey ones usually have incompatible keys.
Bini is 100% correct, I have had Cherry boards over 20 years old that felt like ****, and it is easy to fix them as he outlines. I only bother on PCB mount boards though, plates are too much effort for me...