I’ve used aliexpress for bootleg lego and have had mixed results. Some sets were perfect copies with all pieces, and others were missing some. I was also able to get some discontinued sets which was nice. The quality of the pieces themselves were pretty good. It is a bit of a risk but hard to beat the price as its wayyyy cheaper.
I’ve seen it listed a bunch but i want to highlight project farm.
It is a great channel that tests everything tool related including commom household products. Definitely check it out before buuing any tools really.