What speakers have you mistakenly let go and then later repurchased?

Never, when it's time....it's time......

Vienna acoustic Mozart grand. Bought used around 2008. Sold 2012. Really didn’t need to and regretted selling them. Found a nice pair in 2018. These speakers had the widest sound stage of any narrow baffle smaller floor standers I tried. 2-3feet out past the sides. They are magical with a great low end. 

Magneplanar Tympani's. First ones T-I, replacements T-Id, then many years later T-IVa.

Spendor D7.  Didn't know what I had- sold them and 3 years later bought the D7.2 which are "it".  

Absence makes the heart grow fond, I should patent that. 

Every speaker I bought did something I liked that after time wasn't enough to keep the illusion alive, that said the speaker still excels at what I initially liked about them and each following speaker pair I buy gets me closer to all the things I liked best about each pair. 

so, if we're doing it right we should miss every pair we let go for whatever it was we liked about it in the first place, In my head I just keep going back to the ex girlfriend analogy.