The purpose of this AMA is answer any questions folks may have about buying from AliExpress, specifically as a Maker. Unfortunately I have yet buy shoes or clothes from AliExpress... They don't do my size :D
Simply leave a comment below. I will then reply to you within 24 hours with a response to your question (usually quicker but a chickens gotta sleep you know).
I get all my light strips, diode lights, cabling and all other related bits from BTF. Note that NeoPixels are basically WS281x or SK6812. Haven't tried the power supplys yet, but they are on my list.
https://www.aliexpress.com/store/1728783
Passives, boards, screens, bits and bobs, I buy it all off mega if they have it. I've found their products really good.
https://www.aliexpress.com/store/808897
If Mega Semiconductor doesn't have it, Module Fans usually does, my second go to outside of Mega.