Audio deals you bought that seem impossible for the price?

Buying searching out the gems quality ,brand,build quality then totally upgrading 
myself 20 years modding xovers ,the weakest link in well over 80% of loudspeaker so important being the central nervous system of a Loudspeaker 
the mfg  feels ok is good enough ,out of site out of  mind , in electronics 
many brands Come to mind ,even some very $$ ones nice looking average parts 
quality inside , with over 40 years in Audio and owned a Audio store in the U.K 
I recommended many upgrades ,that’s how Dan Modwright made a name 
he hired top engineers to assist in upgrading the circuit with better parts quality .
currently looking at top quality speakers ,getting a lot of flac on Many loudspeakers even Big names going cheap in the Xover dept.

I got a pair of used Clearwater Audio Duet6 stand mount speakers for $800. They have Accuton ceramic tweeters and drivers, mundorf caps, Supra wiring, just top notch parts all the way and the cabinets I heard were built by Salk and are almost 30lb each. I haven’t heard a stand mount for under $5k that are better, maybe different but not better. I don’t even have a place to use them right now but even my wife said I should hang on to them for as long as I like, and she hates holding on to things. 

I buy floor demo models and second hand. I’ve saved at least 60%. 

The three pairs of Magnepan speakers that I  have purchased.
They sound much better than any speakers in their 
respective price ranges.