picked up 50 feet of some radnor welding cable from my local airgas, was told its "direct" wire(?whatever the hell that is) just rebadged. I'm thoroughly impressed. Paid about $2 a foot and it's just as flexible as anything else ive worked with.
eb flex i was quote at 1.59 a foot, plus shipping. so in the overall scheme of things i have a feeling it would of evened out ($80 plus shipping)
took a picture of it compared to tspec 1/0 ofc on the left, ancor tinned 1/0 boat cable in the middle, and then the radnor 1/0 on the right
couldnt find anything about this cable online so hopefully this helps if someone is considering it