LOL, I find Brioni suits quite often. I have picked around 4 suits the last 3 months, and the 6 months before that I picked 3 suits and left around 5. Brioni is not such a rare find in context. I am sure Brioni has good eBay value, but take a 2003 Brioni suit and place up against a Dior Homme suit from the same period, the smart money says Dior wins hands down in amount of PM's I would get if I listed them. Quality wise, Brioni way better than Dior, but Dior is pretty rare. I have only found 2 Dior suits in last 2 years of thrifting and both were pretty trashed and I could not take em.
Aye, Chanel are vulgar in context of menswear. The thing that jumped to mind was a suit in a consignment in LA that was embroidered with what seemed to be crystal buttons. That suit was ugly as shit but the amount of handwork and detailing was scary. Price wise the consignment wanted a pretty penny - I could have bought 3 Kiton suits from that store for the price of that one Chanel piece.
This is a dangerous list. Helpful, but that's precisely why dangerous. OTO, it has the potential to foster some really great, thread-appropriate discussion, a la that quality list thread that I can never find when I need it. (For example: Not sure I agree with your placement of Stuart, esp by Samuelsohn) Not sure that's worth the risk, though.
Harumphhh, numerous Paul Stuart suits I picked up before and not a dang soul wanted (admittingly I picked suits that were probably 1980's). Quality wise Paul Stuart is pretty damn good and I certainly enjoy the label. Problem with Paul Stuart is that 99% of suits donated are too dated stylistically. Getting the good Samuelsohn or Isaia made suits of recent vintage is about as rare as finding a half decent Kiton suit. This is just my west coast experience though, east coast may be different how many of the nice suits turn up.