where m is the amount of stuff/junk/gear you currently have, there is a persistent need to acquire at least 3 additional items.
Is it possible for you to go any reasonable period of time (2 weeks?) without needing to buy something bike related? Particularly this time of year, I suppose. A new cassette or a cable, replacing a worn-out jersey or gloves or some other cycling-wear. Very recent examples include (a) a new ANT cadence sensor (b) a new saddle b/c one on one bike just never seemed quite right (c) a new water bottle b/c the cap on the old one just seemed permanently gross no matter how much I washed it (and I don't like LBS or ride freebies - I like the Camelbak podiums) (d) a new cassette so I could set up an old wheel as the permanent swap-in for my trainer (i.e now there's no need to swap tires now in order to put a bike up on the trainer).
I seem to always have a shopping list of 2-3 items, and now matter how much I purchase (about evenly divided between LBS visits and online purchases), that list never goes to zero. And I'm not even going to bring up the persistent need for new inner tubes.
How about you?