My biggest regret is selling my EJ silvertip fibre VERSION 1 brush!
This was the original STF developed by Muhle and discontinued in 2012.
That was the best brush I've ever used, from all brush types! It was just perfection!!
The other is selling my huge stash of C&E sweet almond oil shaving soaps back in 2009!
I used to regret many razor sales but since discovering the blackbird, all those razors, in hindsight, are shite!