Why Crazy Prices paid for Pioneer 100 JBL L100 AR1 AR3 AR3A

Have you ever owned these speakers before and why are people paying stupid money for them?
L100s and Pioneer 100s are not worth anywhere near 1k as i owned both. Pioneer 100s hurt the ears. L100s not bad but ive heard much better.
200$ max .
ARs i have never heard before please describe their sound
Seems as if the nostalgia bug is also going around. I worked at a couple of shops that sold both the JBL's and also the Yamaha 1000's. Thank god we carried a couple of other lines that were actually listenable. I can't understand the demand for these. Also, prices being asked for some of the turntables of this era are just nuts. If it was junk in the 70's it is old junk today. 
My Friend has AR3’s, a 3 way,, from the 1970;’s, he has changed out a midrange I believe,, they sound warm, Not bad, they sell as **oldies but goodies*,, = not my cup of tea,,,but back then, they were **The Bomb**,
Pioneer’s JBL’s my guess is close to AR’s,, but again, some folks are still in love with those oldies but goodies... No I would never pay top $ for old technology.
SEAS set the New Standards and blasted the oldies to pieces<<< in a fair shootout. But some folks are either ona tight budget and/or still have fond memories for that old nostalgic stuff
I had HPM100’s and JBL 4312’s. I prefer a bright speaker, but something in the upper midrange in both bothered my ears. A buddy listened to them with me and ended up buying them- said they sounded great. I assume both bring good money these days, but just wasn’t for me.

The old large Advent sounded better to my ears, I can see why people covet them.

Stay safe in these crazy days-
In the mid-1970s I was in retail at Pacific Stereo (a big chain retailer, with 84 stores, mostly throughout California but also with 10 in Chicago and 8 in Texas).  I sold a ton of the JBL speakers, plenty being the L100.  No doubt, they went loud, even with just a medium powered receiver.  I never liked their sound, it was big and brash.  The AR speakers didn't sell as well as the JBL speakers because they were much more tonally balanced.  At Pacific Stereo we had several sound rooms, all with "switching" for A/B comparisons.  Switching from AR to JBL and you were hit in the face with sound pressure.  Customers loved that and most often opted for the JBL.  However, those who were more patient wanted to listen to a full album on the AR speakers.  Only then would they change over to the JBL and listen to that same album.  In that method of demonstration the AR often times got the sale.  They were much more comfortable to listen to for a period of time.  JBL caused listening fatigue while the AR sounded pleasant.  And yes, as others have mentioned, the Advent speakers sounded great and we sold a lot of them, too.  The best method was stacking them, two pairs, placing the bottom speaker box with the tweeter up and the top speaker box with the tweeter down, essentially having two tweeters in the middle and a 10" woofer up top and on the bottom.  That was probably the best "bang for the buck" that I sold.  Of course, the absolute most speakers that we sold was the house brand, Quadraflex.  The ST-19 was a 12" 3-way speaker for $199 each.  They actually sounded pretty decent, and they had a $20 spiff for the sales person.  What fun days those were.
Bought a pair of AR-3A's in 1973, powered by a 55W/ch Sansui 8 Deluxe receiver & Thorens TD160 w/Shure V15 Type III. My first high-end system.
I loved the sound of the AR's at the time but, in retrospect, perhaps they needed more power (55 watts was a lot of power back then).
It's fun to reminisce about the old equipment, but how does one accurately recall the sound of speakers not heard since 1981....?