Buyers Guide: Where to Buy Gamecube Controllers (Summer 2017)

i see a lot of people in the Smash Bros. community as the question, "where is the best place to buy Gamecube controllers?" this of course has many different answers but for the starting player, in this video i go over some of the methods i feel will work best for players coming into the game. (also because i feel generally only newer players are the ones who may ask the question most commonly, in the video i assume the viewer is someone newer to the competitive Melee scene.) if there are any outlets or methods besides the ones i mentioned please let me know! this is for the Summer of 2017 although these methods are really valid anytime, i just mention it because prices tend to fluctuate so much in time.
pardon the gameplay, my Falco is trash
possible FAQs: (adding questions asked here)
how about flea markets?
-flea markets, garage sales, etc. can be a place to find controllers, they just are not too reliable. often 3rd party controllers are commonly found there too
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Joakim Karud - Dreams
NtrlTaste - Unfaithful
May - Birocratic