I recently ordered "technic" parts and sets on the Ali express site and these are of good quality.
If I compare the price with second-hand platforms, it is certainly not a wrong choice for me.
I ordered the Defender for 77 euros and it is a perfect copy of the original.
And here was a surplus from a second bodywork in dark green
I know some members have a problem with this, but it's everyone's free choice where we buy our stuff ...