The value of top end 1080p projection

Over past few years, I've paid anywhere from $5000 on near state of the art, fully automated 3 Chip Dila projectors, to $800 for budget Epson 3D 1080 models on clearance! That said, considering the fact that we are now likely inevitably all going down the "yearly cheapening 4K" unit price slide from the standard players in affordable home cinema projection game, I have to wonder what anyone thinks is TO MUCH to pay for a high quality 1080 projector these days??
Just as a sample size, simply do an EBay search for "Jvc projector", or Google search similar or on Amazon, and you might just be AMAZED at how much online etailers n private sellers alike are asking for their units!!,used, refurbished stock or otherwise! Some sellers are seriously still currently asking upwards of $9000+ for 3 generations old, NON WARRANTIED Jvc models!...$5999 4 gen old models!! ..even $3k+ for non 3D outdated refurb stock units!! Amazing!! Who would still pay this kind of money on an unwarrantied gamble???!
Anyhow, wondering if anyone else noticed the still unusually high price points still prevailent out there for 1080 technology, and would you still be willing to pay even exorbitant pricing on old tech, soon to be outdated pjs?! Cause at very least, I gotta figure anyone holding onto ANY 1080 pj, for which they either paid or are asking thousands for, are in for a serious price depreciation on them, surely?!!! It's gotta happen!
I currently have an otherwise excellent older RS25 I'd last purchased for a reasonable $900 deal, which suits my needs just fine, while I wait for 4k prices to plumit! Until then, I ain't payin thousands EVER again for 1080p, when I can have about as good as it gets in that resolution for much much less. Whataya think??
I missing a couple but, just for reference, I have had the following projectors in my home system, FTR:
Sanyo PLV-Z1
Optoma pk301, Optoma HD65, HD80
Epson Powerlite HC750, 8350, HC5010, & HC5020UB
Panasonic PTAE4000u
Mitsubishi 6800
JVC DLA-HD350, DLA-RS20, DLA-RS25u, DLA-RS48, X3,& RS56u

FTR, the best overall image I attainted was with RS25u! Black level is VERY good, filmlike image, tight pixels, acurate enough THX color calibration, quiet operation, motorized everything! AWESOME IMAGE on a modest sized screen!
Brighter image from HD350, RS45, and Epson 5010,5020 for large screen images, but this units overall Black level and refinement is simply superb! Gets me through just fine till 4k upgrade, whenever..
The cheaper projectors have very cheap lenses. I would buy the best lens package projector that I can afford.
If the budget is $1500, what would be the recommendation? Screen size:100", 24' throw distance.
TWB2, all depends on the room, screen, and setup. Is room blacked out and dark boundaries, or is less than ideal,brighter colored surroundings, maybe even daytime viewing? All this matters.
So, the throw is 24" fixed distance option, and you already have the 100" screen? What screen is it?
Just to recap some 6 months later, I'm STILL using my RS25u, and have now owned/used this pj longer than pretty much any other - and I will likely do so until it either dies, or gets replaced by a quality 4k change effort in the future. Yes, the newer JVC's are a tad sharper and tighter, but the overall image and film-like quality reference and world class leading black level of the rs25u is just excellent (see Sandra Bullock tumbling out into space in Gravity.) -good as it needs to be for now on a modest screen. I think I paid like $800 plus ship on this thing. Truly the bargain of the year for me at the time, and I can sell it for more.
Also, for reference, after nearly 800 hours on eco on the lamp, I can fill about a 110" equivalent diagonal for widescreen movies comfortably on a neutral white screen (lol - I'm using a $40 pure white 1/4" 4x8' board from Home Depot in a blacked out room), with plenty of pop. And NO ONE has anything but WOW to say about the image it throws, even while steaming up-scaled ROKU/Netflix/HD TV broadcasts.
Anyway, besides my PJ setup, about the only other bargain option I'd presently recommend on 1080p content would be either the budget Epson HC5020/30UB on a bigger screen for a large room (bright projector, more visible pixels at distance, not as good black level n so needs something like a minimum Stewart Firehawk, Elite Polar/Darkstar or SI Black Diamond/Slate to make it work best IMO). Beyond that, the 600ES sony 4K projector on same screens.
Pjs still the way to go for movies...FTR