CRT collection (only working monitors):
21" Eizo T965 - completely rebuilt, excellent image quality, but it can really strain your eyes after a bit.
21" IBM P260 - go big or go home right?
19" Compaq 910 - came with one of my dad's work PCs. He used it for a while, then they switched to Fujitsu PCs with LCD monitors and I rescued the leftover CRTs. This is the only one I kept.
19" Iiyama vision master 451 - one of the nicest CRT monitors I've ever used. By far my favorite CRT. Ever.
17" AOC 7KLR - great value for money. This one needs to be looked at since I can't seem to line up the bottom left corner properly anymore. Got it new for my Barton built in 2003 I think.
3x 17" Dell E773 - mostly unused monitors I picked up a few years ago from a school. They were still in their original boxes.
14" Logix - can't remember the model - mediocre at best, but my first PC had a logix monitor so I picked this one up as soon as I found it.
14" Olivetti - this one I found near a dumpster. Image quality is surprisingly good.
None of them are currently in use as they take too much space... I do plan to use them one I have a room large enough to house all my retro shit, but right now my retro rigs use Iiyama, Eizo and Samsung 17 and 19" LCDs.
4:3 (or 5:4) LCD Collection:
19" Samsung 943n black - mediocre image quality but can be found really cheap. Got this one for 15$
2x 19" Samsung 940n both silver / black - same as above. Found them in front of a dumpster. They were both dead - replaced all capacitors to get them going.
2x Iiyama Prolite B1906s, one white one black - LED backlit TN panel - excellent image quality and blacks. I think you can still get these new. One is made in 2012, the other is newer.
Eizo FlexScan S1903 - these things is a brand new LED backlit TN panel unit
Eizo FlexScan S1923 - brand new LED backlit VA panel - best color reproduction of any LCD (and most CRTs) I've ever tried, including newer IPS monitors. Payed something like 170 euro for this one (new) witch is a good deal since they usually go for 400-450$
Eizo FlexScan L557 - mediocre contrast, good image quality, supports all oddball resolutions, extremely sharp - I use this one with my 386.