Originally Posted by Sora2311:
“I am wanting to start collecting more Classic Who but I'm not sure how to go about it.
I'm going to order the beginnings box set, Revisitations 1 & 3, Mannequin Mania box set, War Games and The Five Doctors and would like other suggestions.”
That's a great selection to begin with, except for the Five Doctors, which is a classic mistake people make when starting to investigate the classic series. Obviously, the logic is sound - it introduces 5 of the Doctors, but actually, it isn't really representative of the eras of any of them. None of them were very well served by it (especially Baker who wasn't really in it and Hartnell who was replaced) and it is, to someone without a fan's fondness and indulgence for all of the individual disparate elements, actually pretty rubbish.
Other than that, it's clear you've done your research and your other suggestions are all good. Only other potential niggle is War Games, which is brilliant but might be a tad epic if you're new to classic Who. But I don't know what your mileage and taste for old-fashioned television is.
One thing I would definitely not do: don't listen to people who just throw the names of their favourite stories at you. You'll get nothing but a sample of their idiosyncratic tastes, and of course, there are fans who will vouch for even the poorest of stories.