ALL my seeds used to be bag seeds back in the 70's. That was the only way to get seeds. They just came with the bales of leaves, sticks, rocks and other junk that we used to get ripped off with whenever someone made a run south of the border to buy a couple pounds. But every now and then, we'd get lucky. Problem with that was that no one knew shit about how to grow any of it. We'd just throw it in the dirt and hope for the best. I wish I had those seeds now!
I've had pretty decent luck with some fairly recent bag seed grows, too. I remember a few years ago, when GG#4 first hit the scene. There was a local grower/company that sent out several batches that had PERFECT seeds in a few of the buds. I kept every one, ended up with like 40 of them over the course of several months... and then decided to pop one. It grew very well...did not throw any 'nanners...and the smoke turned out to taste like GG#4. It wasn't a very high-yielder, though, but so what? Taste-wise, it stood up against the most expensive seeds I ever bought. I think next year's grow will be all bag seeds and old seeds that I saved from the 90's when I was buying on the street....if any of them are still viable.