An intriguing offer has appeared on an Italian site:
EOS M + EFM 18-55mm + EFM 22mm + 90 EX + EF Mount adapter = "Full Kit EOS M" = 565€.
The vendor (galaxiastore) does not belong to my "preferred list" (which includes Amazon.it and two other shops) but other Italian people checked it and were happy about it.
Same store, another sudden price drop.
EOS M + EFM 18-55mm IS STM + EFM 22mm STM + 90 EX + EF Mount adapter = "Full Kit EOS M" = 535€.
I must confess that I am tempted now. I'll talk to the Board of Directors (i.e. my wife ) about it.