Whilst obviously electronics and sound quality has come along a lot since then buying a 'complete stereo system' these days for about £600 would be considered a bargain.
I see B&W 70 Monitor speakers were about £120 then. Hybrid electrostatics. Don't see many being sold these days. A pair came up a few years ago which I thought of grabbing. Interestingly when I look now I see a 70c pair being sold in Hove "requiring restoration" but seemingly in good cosmetic condition so may well be good inside. Big footprint though and probably a 3 man lift.