If you truly enjoy what you are spending money on, it can't really be considered over spending, in my opinion. Mrs. Me might see it differently.
Rare is the time that I have invested too much in a vintage bicycle. Having found quite a few, meaning a heck of a lot, I can think of three that I might have spent too much on. But, even then, I still had fun doing it so I do not consider the money poorly or over spent.
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"98% of the bikes I buy are projects".