recent dyed yarns

Here are a few skeins of yarn that I have been practicing on a bit.
I found a box of dyes that Grandma gave me yonks ago, and thought I would give them a try. The black is great, very true black. It ran a bit though, even with rinsing... will need to be careful.
I am thinking about selling some dyed yarns, but I am not sure it's worth all the effort on the business front. And I have no idea where to start in finding a great base yarn that I can get at a reasonable price.