Your dealer is probably getting it from the markets, plus you are able to review the "dealer" you are purchasing from beforehand. The escrow system allows you receive your product, test it, try it, and if their is something off you are able to correct it with the vendor through messages or the dispute process (Do not abuse this). Not really the same for the streets unless your really close with your dealer. Also a lot safer...
I guess there are people who don't want to go into streets and do it this way. Don't want/ don't know how to/ don't like the risk.
Another one will be the quality, many shit products on the streets (don't say all of them, but still). Can very per region/ country, I would assume this is very attractive way for people to get their stuff in certain areas.
Would add comfort here? Find the market, find the vendor, no need to get your hands dirty. And when ordering from domestic vendor, it won't take weeks.
My thoughts on this one;)
So people living in the same street won't have to suffer the consequences of my addiction. No shady characters hanging around, no druggies, no disputes, no gunshots. Or less, anyway.
Weeks? Lol
I doubt you can get ANY drugs you want on the street. The best answer to your question though is variety, reviews, promotions sometimes and more bulk or smaller amounts too.
All my problems caused by drugs were caused by the war on drugs forcing me to interact with criminals on the street to to get my medication. Multiple arrests by law enforcement. Getting mugged and beaten up by other criminals who know I cant go to the police.
This all ended once I started using dark web markets.
Sure I have lost a hand full of packages out of 100s ordered on dark web but its 1000x better than buying of the streets.
Quality and price is also far better than streets.
1) I am too old and risk averse to visit open air markets to cop and I don't know anyone who deals anymore. 2) I don't trust the drugs I get from the street. Nothing is 100% certain but with reviews and lab testing reports I am reasonably comfortable that I am getting what I paid for through DNMs. 3) The delay between when I order and when the package is actually delivered provides some small protection against impulsivity.