Not really...the R8 is often at 1100€, and I bought brand new it for less than 1000€ this month, about the same price as a second hand R6, with a smaller form factor, better autofocus and better sensor, and new. I don't like buying second hand sensors.
You're right, I just took a look at eBay, I wasn't really following R8 prices, last time I saw them they were around 1300/1400€ for an used one, with R6 being available fro 800€ to 1000€, it had dropped considerably, I see them around 1000€ used, that's good.
Better AF and better sensor...but just two dials, small battery, no joystick, no grip...you know the drill

sensor and AF on R6 are already exceeding my quality and speed requirements, so I don't see any advantage on R8/R6 II for my needs.
I would be much more interested in the R6 III because a mpx bump from 20 to 32/34 (or whatever they will be) is much more substantial then the pretty small 4mpx bump from 20 to 24. But of course I'm not going to buy it, I don't need it, and even if I did, I don't have the money.
At the moment I'm still considering switching to Sony (even if the 28-70 STM, which I have, and the coming 45 f1.2 which I'm probably going to buy immediately if quality is any good, are unexpected surprises that slowed down my Sony cravings) for the wider range of third party lenses, especially Tamron 35-150 is the lens I really want, if I switch, that leans will be the absolute cause, because then I can ditch both 28-70 and 70-200 for a single lens that does it all.
I'm just waiting for the A7V to be introduced to see how the prices of used A7IV are affected (A7III doesn't feel good enough), and start doing my homeworks from there.
p.s. we really are different, I really DON'T like buying new sensors, they're too expensive, used sensors cost less ;-) I had just three brand new cameras, the 5D II because I was young and stupid and wasted all the money from my first wedding on it (plus sale of the 5D classic I was using), the 6D because brand new price was equal to 5D II resale price (and I wanted to ditch old and cluncky CF cards for smaller and cheaper SD's, and also sensor ISO was better and the central AF point was working in total darkness) so it was zero moeny swap, and finally the R6 (but nearly two years after introduction, so with price already lowered) because it was my 40th birthday self present.
All the other cameras, I purchased them used, and they were A LOT :-D I had 10D, 20D, 5D, 60D (3), 550D, 100D (2), 600D, 5D II (extra 2 used), 6D (extra 2 used), and recently M6 II, RP (3) R (3), R10, R100 and an extra used R6. I just bought a M5 for leisure and as an emergency third camera, it's on the road to me as we speak. If I see one super cheap I buy it, use for some months or even weeks, and then resell it for a profit, it's nice extra cash in the pockets. And with lenses I'm even worse in numbers.