I decided I "needed" a new suit, but was unhappy with my options and how much it would cost to get a suit I liked for how much use it was likely to see. I decided to try a different approach getting a lightly used suit.
TL;DR: I purchased a high quality used suit on EBay, paid to have it tailored. Although not "cheap", it was still less than I would have spent at Men's Warehouse for what is hands down the nicest and more flattering suit I've ever worn - by a massive margin. Basically $2,000+ suit for ~$300.
From now on, I will be buying suits or sport coats used and getting them tailored.
Full version:
Background: my partner* of many years and I decided we should actually get married for reals, and that even though we're just going to go to the courthouse for a license, it's a good excuse to buy a nice new suit for me and dress for her, and look good for the occasion. (*I refer to her as my "wife", because that's the most accurate description of our relationship. We just aren't legally official.)
Over lockdown, we started lifting weights. I'm not massive, but I am now significantly thicker through the shoulders, chest, and glutes than average, particularly for my belly. I was not able to find a suit that would fit properly (even if tailored) at Men's Warehouse, and I was not going to spend $600+ for something I'd need to look for excuses to wear.
EBay is surprisingly good at search options for suits. There are quite a few stores that specialize in lightly used menswear. A lot of them look like they buy whole wardrobes on consignment from rich men who may have worn each outfit a handful of times. I purchased an incredibly nice suit for $130 (and probably could have found one for less). A Paul Stuart suit made in Japan. It fit my chest and shoulders well, but needed a lot of tailoring.
I went to a high end tailor (pricey, but good work). His immediate reaction was, "Wow. This is a *beautiful* suit. They do not make them like this anymore." He adjusted almost everything that could be: pants cuffs and waist, jacket sleeves, waist, and lower chest (not the shoulders, upper chest, or the length of the jacket), and it worked out to $200. The jacket is a touch longer than ideal (not modern fashion; but classy), but that would have been another $200 still, and if I'm unhappy I can do it later.
If you are proportioned with a more average or common build, you would probably have an easier time finding something closer to your dimensions and needing less tailoring. You could probably be done for about $200.