Not sure if I can list this..but I have a Pfaff 1425 walking foot sewing machine. This is a very heavy duty machine that you can sew right through the backing boards with etc. It's 220v single phase, servo motor and uses air assist for certain functions and lubrication. Sew material up to about 3/8" thick.
They sell for over $2000 (used) without the included Efka controller. Asking $1200 or trade for tools or whatever ???. Don't need this one..have a Juki LU-563.
Couple of related videos, first one to show some features, second...it sewing: