I agree with your philosophy, but damn, that's alot of spare parts. Especially when you don't know what parts you really need. While I love the idea of having a relationship with a LHS, I don't have any desire to spend more time and money for something I can have delivered to my door. Love JRC tooLosi parts may not be available online when I need them, or don't want to drive 1 hour each way to LHS. I shop for replacement parts on jennysrc, so if they have parts, I will stock up. If they OUT, never know when stock will replenish.
I have 4 RC's don't need another one to buy parts for. Better safe than sorry when it comes to parts, when you live over 1 hour from a LHS, or cant wait 5 days for shipping.