How long do the leads on all the components last if using a breadboard? 5, 6 times until the leads snap? What's a good way to preserve them? Should I bite the bullet and buy a cheaper resistor pack from amazon?
I think your average resistor would be a bit more durable than that, maybe 10-20 bends before the leads snap. I haven't had a component lead snap from breadboarding yet and I've done a decent amount. But also they're 1 cent a piece.
With those Amazon packs you'll wind up with heaps of values you never use and go through the common ones really quick. I'd recommend just grabbing a bunch of the common values from Tayda, then maybe 10 or 20 of some less common ones depending on what you're breadboarding.
I haven't had many components snap from breadboard abuse. Do your resistors have chunkier leads like most standard 1/4W metal film resistors, or are they thin & floppy like 1/8W? I have some cheaper 1/4W metal film resistors from Amazon that have the thin leads, and although will work in a breadboard, I generally avoid using them.