Clark Plasma King 50 plasma cutter, bit heavy! for model engineering,
but maybe you are interested. Would be a good way to rough out frames etc.
I bought it to restore a 50's van to make the work a little easier so
it's been used very little. Can cut through 10mm steel!
See the spec and current prices here:
Also pictures here:
Needs a decent compressor to run it and a 40A single phase 240v mains
supply. £860 when new, looking for £500