What are the items/models that you have owned more than once? And loaning "software".

Here ya go!!
https://www.theabsolutesound.com/articles/the-12-most-significant-loudspeakers-of-all-time#:~:text=T...

Mission 774 tone arm, ARC SP9MKII.
G

3 pairs of the Large Advents

7-8 Dynaco Stereo 70's

5-6 Dynaco PAS3 preamps (2 PAS3X)

4 Dynaco PAM/mono preamps

3 Advent 300 receivers (one with the 12V function)

5 Thorens TD160's (various models)

Keep in mind that in the mid/late 70's you could purchase a Stereo 70 for $35, or so, and the PAS's were going for $25.

The Advent speakers were all purchased from Sound Labs in Des Moines where the owner (Harry) gave me discounts and/or dibs on returns.

DeKay

DeKay, a bit scary, every item you listed I have owned, all only once, but one could say I owned the Large Advents twice since I had two pairs stacked with the top one upside down...to get the tweeters close together which helped the image. A "burned into my mind" memory was the first time I heard the Magneplaner 1D speakers..the three panel models.....think my friend was using a Crown Pre and Power amplification and likely an early direct drive Dual turntable with either a Shure V-15 or and ADC XLM....all with first gen Monster interconnects and speaker wire....and it sounded....ah.. let’s see...FINE, VERY FINE.

(and a P.S. Since the store I worked at was an Advent dealer I had the chance to hear the "double Advents" that Advent people had set up at C.E.S. and the top pair was upside down)....w/the tweeters close together.

The store I worked at was in Iowa City, named The Stereo Shop, which later was sold and re-named Audio Odyssey. 

I've only owned the following on 2 different occasions. Bought, sold, re-bought, re-sold.....

- Monarchy Audio SM-70Pro class A amplifiers - both times, I owned a pair of them
- Resolution Audio Opus 21 CD player