[MrBungle]

The heating upside shouldn't be shrugged off. I had an 8 processor Sun 1000E SPARCserver and associated disk arrays as a desktop for about 6 months in 1999 after the company I worked for chucked it in a skip. It ha cost around £250k a few years before and was worth nothing. That kept the house nice and warm.

Then the electricity bill arrived. £250 more than expected! Straight on eBay, which just about paid off the electricity bill! That's depreciation for you.