Mick 1986

Hi, I'm after a bit of advice I was left an audi 100 by my uncle, Unfortunately I don't really want it, but don't know the best way of selling it, as he looked after it very well I don't just want to sell it to somebody who wants a cheap run around. Can anybody advise? It's in mint condition with low milage. I think it's classed as a classic now. Thanks