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

Purchased B&W (Bowers & Wilkins) 802 Nautilus in 2000.  Because I was downsizing and thinking they were ill fitting the new abode, I sold in 2015.  What a ludicrous mistake.  Tried out 803 Nautilus and 804 Nautilus to fit the new room, and not as good sounding.  So found a pair of 802 Nautilus this year and problem solved.  

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".