Just scored a Sun GDM-5410 for $10, courtesy of craigslist.
Didn't know the model name at first, just that it was some Sun-branded 21" aperture-grille CRT. Turned out to be another FD Trinitron G1 monitor like the Dell P1110 I already had (was secretly hoping for a Diamondtron NF, just for something different) and braced for the worst.
Lots of green, but the OSD's Color Return fixed most of it, as well as the high G2 brightness. The top edge was also convex, but a degauss and warm-up seem to have solved that as well.
No signs of blooming during cold start, focus loss, or popping (both visible and audible), either. My P1110 already randomly suffers from that. Not a good sign.
Only things I don't like so far:
-This one has some obvious scratches in the middle of the screen, at least enough to cut through the anti-glare layer. By comparison, the P1110 only had a few nicks near the bottom edge. For $10, I can't really complain too much.
-The P1110 has two VGA inputs, neither hardwired. The GDM-5410 has a non-hardwired DE-15 input...and a hardwired DB13W3 input that I have no use for since I don't have any Sun, Silicon Graphics, or IBM RISC boxes around here.
-The P1110's ECS port (a TTL port needed to use WinDAS) can be accessed just by prying a little cover out of the back. Not so on the GDM-5410; looks like I'll have to remove the whole back casing just to get to it.
-The P1110 has no qualms with me trying to force higher refresh rates on it. The GDM-5410 outright refuses-it's even given me "out of range" messages just from settings the EDID permits! (1280x1024 112 Hz, to be specific.)
Despite all of that, the GDM-5410 is going to become my new primary monitor until I can figure out how to fix the P1110 properly, doing parts swaps if necessary...but I simply do not feel comfortable messing around in a high-voltage device without prior experience or training for obvious reasons.