it's a lot of money for the size of compressor, and don't forget to add the cost of all the other bits and bobs on top if you don't already have the drier and regulator and oiler and stuff plus the little bits of hose

i've got a 150 litre one that needs to be wired directly to the fusebox on a 32a thingy and i think arch has the same, and it's birlliant, but you won't get much change from £500