Would it be smart to start with a TA03F pro drift spec chassis kit 1/10 4WD? I have some questions about it:

Do you think they are really rare, how much more time till they become very hard to get?
You can use any tamiya main part with it right? (speed ctrl, motor, etc)
Are the parts hard to get? Think I should buy one from ebay? What is its lifespan?

I mean, if they wont be available for much longer, might as well get one since I heard they're great for drifting right? Thanks