I give you an address that is worth gold, where you can find all the legitimate sites in the dark,
do not trust others if you are starting out, these sites you will find all have the service of escrow,
those who offer you telegram deals 90% screw you, I I learned everything with experience and patience.
http://raptora2y6r3bxmjcd3xglr3tcakc6ezq3omyzbnvwahhpi27l3w4yad.onion/
Good luck