A complete system second hand; Lenco 75, Quad 33, 303, JR149s and a Hitachi D550 cassette deck. The result of a lot of saving and coming into a couple of hundred quid in a will. 1978, I’d have been 15. I could pretty much build that system today, just with a 124 in place of the Lenco!
PS There is a first system thread somewhere, though it will be a decade or so back in the archive at least!