I was able to get mine brand new for $6k several years ago, I'm sure you could get them at an even bigger discount now. You can get the 4367 for about $8500 new now from certain dealers in the US if you ask nicely.
Every time I see photos of these in reviews they're set up improperly, towed in toward the listener. They should be pointing straight into the room so that the soundstage doesn't collapse. Even so, the reviews are generally favorable. Even Amir enjoyed them after the less-than-perfect measurements set them up for failure. JBL has a lot of experience with this form factor, and they do plenty of blind testing like Revel.
If you're someone who's seen a lot of live amplified music, and enjoys that sound, then these are probably the right speakers for you. Dynamics and depth of soundstage are phenomenal. And they will play at live levels without a sweat. They're also built like a tank, which makes them ideal if you have kids.
I always get the itch to sell them and try something new, but there's just something special about these. They don't have the most sparkle up top, and they don't reach the lowest rungs, but everything in between just works right. It feels palpable...if you close your eyes and listen it really feels like you could walk up to the performers. Turning up the volume just gets you a few rows closer in the venue.
Someday I'm sure I'll try something new, maybe something from March Audio—I'm using their amazing P482 amp—but until then I'll keep enjoying these several hours a day.