I still like to buy my cheap and esoteric Chinese stuff from Amazon. It's a good balance of not-too-slow-delivery and not-too-expensive for very specific stuff. And it's easy to return if it doesn't work.

Example last purchase: An optical SPDIF/TOSLINK to 3.5 mm DAC box (5V/USB-powered) to put behind the TV with a broken/very low quality audio output. It was about $15 including 25% VAT. Probably like $5 on Aliexpress, but I didn't want to wait 6-8 weeks.

Never really buy anything for more than $50 from them though. And never anything containing Li-Ion batteries.