Thorens TD150 mkII turntable - a gift when my brother was cleaning out his garage.
AR turntable - bought used for $50 in 1980
Wharfedale Diamond 12.0 bookshelf speakers - the overall capability of these speakers would have been unheard of at this price point only a few years ago.
Chord QuteHD dac - bought used, when combined with MCRU linear power supply, this is the biggest single performance/price bargain I’ve found yet.