One of the reasons I rarely sell gear these days is due to my regret of selling a near mint condition Yamaha RS-7000. I absolutely loved it, but was transitioning to an in-the-box workflow. The said product was still being manufactured at the time of the sale, and my thought was another new unit could be purchased later on if I missed it.
When I decided to purchase another RS-7000, they were discontinued and completely sold out at stores. I guess I could have purchased a used RS-7000, but I rarely will purchased a piece of used gear without seeing it in person.
When I initially transitioned to an in-the-box workflow, I never thought I would miss my hardware setup, and sold about 75% of the studio gear. Fast forward to the present, at least for electronic music (i.e., Detroit Techno), I am completely out-of-the-box, and wish I had all of my old gear back. A few other items I greatly regret selling are the Akai MPC2000XL, E-MU XL-7, Alesis Ion, Alesis HR-16B, and Yamaha AN1x.
I sold my Roland Jupiter 8 and my Jupiter 4. Those are my biggest gear selling regrets, especially the Jupiter 4. Hall & Oates bought my JP8. I always wonder what songs that ended up on.
I had for a time the touring MKS-80 previously owned by Mike Score of Flock of Seagulls, still had their patches in memory. Sold it for the lack of editor options available then (and couldnât rationalize the cost of the Roland programmer at the time) but really should have held onto it.
It still blows my mind that Roland has failed to reissue the Jupiter 8. All of the old school Analog Synth builders have proven that there is a market for expensive analog flagship synths.
I regretted selling the MX-1, so bought another a few months later, remembered why I sold it in the first place, then I quickly sold that too.
Few regrets from selling gear.
Genuinely amazed that the OP claimed the MC-101 had build quality worth shouting about though. I owned one for a while and felt it was probably the worst built machine since some of the toy keyboards in the 80s
That a market exists is not the question, that enough can be sold to warrant Rolandâs interest at their desired price/profit point is what is questionable.
I wish i could say i owned an andromeda a6 to post gear selling regret about it, and they reissue it so i buy it at whatever price.
Then sell it eventually, and wonder why i didnt keep it.
So im preemptivly posting my gear selling regret.
I regret selling my Doepfer Dark Energy MkI. I thought I could recreate its sound in modular or other synthesizers and I was wrong. I noticed that Doepfer is now getting clones of the chips they used in the MKI so maybe theyâll start making it again.
I sold an AN1x, it was my first synth and I was not able to understand it at the time. I was a total newbi, I bought instead a Nord Modular G1, I loved it and I learned synthesis with it. No regrets.
I sold the Sidstation, very unique synth! The monomachine emulation is a joke compared to the real beast I was a little tired to always used the same sounds (the ones from the presets, because the programming was not fun and no software editor )
I sold a Black Lotus white boarders, I regret, I should have wait more
Nowadays, I never sell anything. Even the euroracks modules I think I shouldnât have bought, I always wait and succed to love them after taking time to understand their function.
I know that if I never sold anything i could find uses for them, but even with a home i donât have space and unlimited funds and headspace. Perhaps if i could donate them all to a local gear-share collective if such a thing existed
I was a little tired to always used the same sounds (the ones from the presets, because the programming was not fun and no software editor 
)
