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

Thiel CS 3.7, thanks to my wife i bought a second pair after having sold the first pair lol

Beveridge Electrostats. Sold my 2sw's and later bought the original 2's.

Ohm walsh 5000

Much to my chagrin…Thiel CS 3.5 and Magnepan MMG. As Joni Mitchell once remarked, “ you don’t what you’ve got till it’s gone.”

Currently I have a pair of MMG back in my setup, the eventual return of the 3.5 will come when the stars, the moon, and my wallet aligns. 

@oblgny: If you have room for them (51" wide each), keep your eyes peeled for a pair of the Magneplanar Tympani T-IVa, or it’s predecessor T-IV (48" wide). It is the first Magnepan offered in the style of the current MG30.7---three individual panels, two for bass, one for mids and hi’s. Only a few hundred pair (fewer than 500) were made, and show up for sale every few years. Fantastic sound from the legendary Magnepan ribbon tweeter, with two large magnetic-planar drivers that produce clean, lean, taut bass. You’ve never heard an upright bass (and kick drum, etc.) sound as real as it does from a Tympani!