Which bike, I have 3.
Mountain Bike - It was given to me by a college friend who was moving overseas. I have replaced the tubes, bought a Bell water bottle and computer - $50 since 2003.
Trek 7.2 FX 2006 - I bought it used off CL $200 in 08. It was a college student and was stored outside. It needed bottle cages, a computer, new chain and cables, all brake pads, extra tubes, saddle bag, tire levers, - $125. I later replaced the seat - Forte $20, Bar ends $20, extra headlight $80. Total - $ 445 .
Trek 2.1 2009 - I bought new in May, added wireless computer, saddle bag, frame pump, extra tubes, tail light, bottle cages, water bottles, clipless peddles and shoes - over $1k but less than $2K . I ride at least 100 miles a week, much more if time permits - I now commute 3 or 4 days a week.