the problem here is the following, i think:
-the "for free" (incl. very cheap) available equipment indeed kills the market for good quality new darkroom stuff and for reselling used but high end and well kept items = sellers complaining
-the ""for free" (incl. very cheap) available equipment is "you get what you pay for" -although very tempting for a starter in darkroom, you sooner or later find out there's always something wrong with the stuff you got for free. It's either missing a part, or is badly misaligned, or needs some exotic bulbor powersupply, or leaks light, or the focusing rail is rusty and slipping, or such. So you end up gathering more and more of these (almost)free enlargers and all the "stuff" that comes with it, in the hope of having a well working setup eventually. = the buyers also disappointed.
For example here above an omega chassis is offered for free. But it's a chassis. Where would i get the rest to make it functional? Ebay is a crapshoot and some NOS parts do go very expensive (compared to a "free" enlarger chassis, not compared to the original new price).
I picked up locally a Beseler 45 (the manual cranked version) very excited, cost me a bottle of wine, but it only had 35mm "full frame" film holder and a non-adjustable condenser set for 4x5, and a kodak camera lens with a mount smaller than 39mmLTM with a rubber ring to "fix it" in the lensboard. It also had a sideways misaligned head.
Conclusion: Above 35mm i can't use it as there's no film holder.
At 35mm i can't use it as my 50mm el-nikkor needs a different condenser setting and this version has only one bellow (focus bellow). I can use it with longer lens (=what i do now) but then that limits the enlarging capability.
Additionally i bought some more film holders (6x6,6x9) on ebay form the US but i payed quite some money for them.
And i messed around for hours figuring out that it's sideqways misaligned int he default stand and fixing that by mcgyver "solutions".
So,- it works now OK but it wasn't really "for free" anymore.
Other example: I received almost for free in a package two separate FB print drying tools (the heatable one with canvas) incl. the ferrotyping plates which i would not use anyway. From two different owners. BUT both are missing the wire with the special plug
) so i'd need to make a plug for it as i cannot find the wire only anywhere.