Back in the early 2000's, I started buying these because I thought they were a cool idea and they were dirt cheap. I can remember paying $20 to $30 on eBay...that was when shipping was $12 to $15. I think I had 2 or 3 helixes and 5 or 6 of the doubles. I drilled one of the doubles for myself and remember it being a bit over/under. In the oil it would skate, but when you hit the dry, it would take off like crazy... did have a couple decent sets with it though. Ended up selling the stash a few years later for about the same as I had paid... If only I would have known... oh wait, just because they asked 7 bills, doesn't mean they will sell...