The Mexican primo is real but way over priced. They charge $11-15 for a 50mg amp.
This is wierd because that same amp used to sell for $1.20.
I went to buy some one week... and they were the same $1.20 they always were. I went back to buy more a few weeks later and the price had jumped to $11. I never got an explanation for the 10X price hike.
Back in the '80s you used to be able to get 1,000 for $600.