I sold my '78 'sud in '86 and went into House of Fraser in Manchester and blew most of it on a Sanyo tower system.
I don't think anything we own at the moment apart from the house is worth more than a few hundred quid.
But of course, hundreds, if not 1000s are poured into maintenance and improvement of both cars and houses. In the case of cars, you rarely get it back on resale. In the case of houses, you'd be unlucky not to make a gain. However, unless you're downsizing or buying in a cheaper market, it's all relative when you are buying in the same market.