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

None. Owned twelve different models since  the 70s. No regrets.

Merlin VSM 

@grannyring Why's that?

I really liked the sound of the VSM with Cardas cables and Joule tube gear. Great imaging, detail and so enjoyable. They sounded like high quality monitor speakers in the way they could disappear. However, they can sound a little thin with the wrong cables and electronics however.

Great Esotar tweeter that Bobby made sing.  

i too fondly remember the merlin vsm's, lovely small form factor speakers that could play big and still sound natural , ....those, along with those from joseph audio’s were always really excellent sounding in their respective demo rooms at high end shows over the years