For 6 or 7 years ive been getting mine off of close close friends

One time i was desperate, and an "aquaintence", not a close close friend, but he said he could get it for me no problem. He needed the $$$ up front because he didnt sell it. So I gave him the $$$ and he said he be right back. Of course I cant ride along because the dude dont know me. Three hours later he comes back, after 100 phone calls from me later. He tells me that he had to drive real far and the other guy rippped him off. Why would anyone that u normally buy from should rip u off. Never saw him again.