I purchased a new M6 and 35/2 and 50/2 in in the late 1990's when I initially got into Leica rangefinders. More money then talent back then, but there was some Leica rebate at the time. Later purchased a new MP and 50/1.4 ASPH when they first came out, thinking that would be it. Paid full prices, about $2595 each, thinking that stuff was soooooo expensive. Little did I know Leica would keep raising the prices. Ha, ha, thought that aspherical lens would be the be all and end all, but really too big for me. The best time to buy M stuff was circa 2005-06. With Leica nearly going out of business, a few stores started stores liquidating inventory at cost, I got some lenses (35/2 Asph, 35/1.4, 90/2.8), an M7, even tried a 0.58 MP (hated it!) -- all new, at cost. Ebay was a great place at that time. Most of that stuff I used until about 2012 when I got out of rangefinders. I either made a little profit or broke even on the equipment.
When I got back into rangefinders a few years back, it was either used or third party. Now I have a couple M2's, an old Summicron, and some third party 35mm lenses. That's all I need.
Don't understand why people would buy new Leica today, it's so expensive, but I was doing it 25 years ago. Owning Leica isn't a left brain thing.