Your single most significant purchase mistake?

There was a recent thread regarding McIntosh and a lot of folks trashed the brand. Interesting that only one mention where someone bought a Mc product and did not like it!!! FWIW I do own and very much like McIntosh.

There are those items I let 'go away' that I regret now.....but one must move onward and up 'different', which is my rationale...or excuse, if one prefers....*s*

One either enjoys 'where you're at', or off into the swap swamp or into the detail dilemmas (cables, ic's, specs vs. reviews vs. 'bench racing' ) and the eternal "...it costs What?!"

That can kill allurer faster almost as fast as snorting bleach...which, over audio items, is understood but rampantly inconceivable.

I like 'the cheap seats'.....but picky enough to get the good ones... ;)

I have had good luck with a couple of items discussed here.  
1. I was a very happy owner of NHT3.3, after pairing them with what seemed to be the right amp and cable combo (BEL Mark IV and cardas wire). 
2.  Bel Canto: nothing but good luck with their amps.  
 

Worst decision: selling the BEL Mark IV

Best decision: Proac 1sc, for my ‘office’ system

Martin Logan Sequels. 

Smallest sweet spot ever.  Move your head 2 inches and it sounded like you put a bag over it.  Thin, brittle sound.  MLs may have some good speakers but those were not it.