#1 Rule of this business is to Always test the hair you receive from vendors.
The main thing to do is to wear the hair for 1-2 months to make sure it is good enough to sell.
Look for light to no hair smell.
The ends should be full and the same texture as the rest of the hair.
Feel to see how soft it is.
Cut the wefts to see if it sheds at all.
Bleach a bundle to see if it will go to 613.
Color it to see if it takes it well.
Inspect for short pieces.
Take it to the gym and sweat it in it.
Curl it and see if the curls hold.
Sleep on it without a bonnet.
The hair may shed a little after you co wash it.
You can find valuable tips like these and much much more from our E-Book