I can tell you one thing: WBF has an impact on the market. In 2021 it was not uncommon to find one or two for sale with some frequency. The more we've chatted up the Lamm ML2/2.1/2.2 the fewer of these amps are found today in used condition for sale in North America.
My interest in these amps is long term - I started a
thread about matching speakers for the ML2.x back in 2018. The ML2 came out towards the end of 1998 at $30k/pair with ML2.1 arriving 2004 at about the same price. 2020 msrp for the ML2.2: ~$46k USD. For the past 9 months I've been following the used market for these monoblocks. It is within the last 6 months that US availability grew scarce. Today used prices for ML2.1/2.2 run ~$14k - 20k - if you can find a pair. I think $14-15k is something of a bargain for what they are.
Being a world-wide market and world-wide forum, there are examples for sale outside the US:
ML2.1 is the direct replacement of the ML2 -- the first in a line of LAMM single-ended amplifiers with a regulated power supply that represented a new generation of power amplifiers employing unique high current low impedance power vacuum tube triodes (6C33C) in both the output stage and voltage...
dubaiaudio.com
www.ohm-audio.nl
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www.highperformancestereo.com
(picture is M1.2)
Lamm ML2.1 2005 monoblocks Class AMint condition very low usage (not broken in)Factory checked and EU voltageSet of new tubesCurrently stored in London by a leading UK distributor of HiFi equipmentAll fees paid by the buyer (bank wire, can be supervised by the distributor)
www.ukaudiomart.com