I'm more along the Lines of... B and C lol

And My XC bike (cross country) Hasn't imploded on me yet. It may Spontaneously combust though.

When your wheels and stuff start to Look like Bannana's and your fork buckles, and your frame/crank arms crack... you've reached your limit.

60.00 is cheap for a tuneup.
My LBS charges 120.00 for a full tuneuup