Alfred,
I've looked up all the info I could find on the 123ignition on this website, and there is quite a bit. It tends to be from UK/European owners, given that the Americans seem to lean more towards PerTronix, which is harder to get over here. So I think it maybe just an availability issue.
I've read a lot about 123 on the internet and I think that, given my current distributor woes (see my most recent drama/post), it seems an attractive way forward albeit quite expensive. I have been thinking quite carefully about buying one.
To enable you to compare prices, the best I've seen for a distributor for a 113 is about £180, or about Euros 270 ($350). I think that prices includes tax, so if you purchased from the US, you would save between 17.5-19% depending on whether you purchased in the UK or Germany.
It would be interesting indeed to see what reduced price the German pagodetreff crowd are getting.
James