The, erm, shape they nearly always have been, the 90s ones, 4litre 32valve supercharged V8, can be had from anything from about 3.5k for a tidy early one to 7-8k for a mint low miles late one, which is insane really as the equivalent age/condition M5 is double that.

Can get decent E39 BMW 5series for 5k or so, I got one coming soon, on a P tho, estate, lowered, 6series wheels, light smoke tints, etc, really nice car, tho im tempted to sell it actually