I've had 2 necks from ebay and one from ali express.
I have used both ebay necks and they are working well
I fret levelled one, it wouldn't go dead straight but my course teacher, Dom (Crimson guitar fret levelling course) did say some necks are like that, get it as straight as you can, then level crown and polish
turned out nice (lovely flamed maple too)
the other neck didn't need levelling
The Ali-express neck hasn't been used.............yet