I`ve got one, lovely on thin sheet, i think the lowest setting is about 25amps which is nice. Really could do with a cooling fan if used at full power all day, but hasn`t really caused me too many problems. No idea on age or cost new, bought mine second hand having just been serviced and new torch, must be 6 years ago now, paid 300 then.
I bought mine 2 years ago on ebay for £200 , its a good little machine, hasnt let me down yet, my son loves it, consumables are as cheap as chips, thats the bit that got me a new liner 5 meters was a fiver tips were a quid each, had a clarke before and that was pants