I bought a 97 disco auto.... Jap re-import (less rust than a UK car) with 85,000 on it (now)
I replaced the alternator belt tensioner,front pads, had the an "a" post, rear body mounts and rear cross member welded with repair panels from YRM.
replaced the springs and shocks and a full set of mud tyres (insa turbo saharas)
And serviced it.
I reckon it stands me at about £2000 now.
So yes if you want a disco and if your prepared to put some work in.