My wife's boss is just about to turn 50, and has been a runner for a long time. He does full Marathons, Doubles, and Ultras. Total running nut. BUT now that he's getting older and starting to hurt a bit, he's starting to see the wisdom in riding.
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'75 Fuji S-10S bought new, 52k+ miles and still going!
'84 Univega Gran Tourismo
'84 Univega Viva Sport
'86 Miyata 710
'90 Schwinn Woodlands
Unknown brand MTB of questionable lineage aka 'Mutt Trail Bike'
Plus or minus a few others from time-to-time