I have no idea what an bag of dope goes for these days--$500 seems a little wild, but I can't comment--?. A bag of dope in the day that I participated would last awhile--at $20/25 a bag, I didn't keep track.
I do know that in Amsterdam, I bought one fat boy for $1.50 American---already rolled, had tobacco as a filler, was very mild--as smokes go--and I had a very mellow high--about as good, as I recall, as the average joint did back in the day.
I sat next to one fellow and we were having a very plesant conversation---but, he quickly went into hisowself from whatever he bought to smoke.
Personally---I enjoyed the high I got and did not want to go any further. Now, boys, from what I observed at the coffee house I visited---there are more varieties of smoke than I ever knew existed.
Like drinking--you can enjoy a very plesant drink or two--or you can get wasted and say "hold my beer and watch this", as Hank Jr said about his rowdy friends.
Folks tend to do what they want to do, so, in this regard--like bars--you need to watch where you go & who you hang with . Everything in life is the same way.
Blessings