I hate to buy online, so I don't.
Find a local B&M store and see what bulk they have. I have one shop that has 16 in house blends.
They are cheaper than even the drug store blends.
You can buy as little as one ounce to sample, then stock what you like.
Their most popular blend (I asked them) to me is a knock off of Captain Black. Its not that popular with
me BTW.
You will find that most in house bulk blends are a knock off of some other common blends.
Bonus:
I kind of got to know some of the folks there. He had a mild English blend called "Fox and Hound" (I think).
It had been given to him as a sample some time ago, but wasn't moving. He didn't even have a place on the
shelf for it. He cut me a great deal, about a $1/ounce. Its mild enough even I can somewhat enjoy it.
And its great trading fotter with my BIL, he will smoke anything...