Very little being used still that is bare lead. I just went to my local shop that I get weights from and went through a 85# pail. I sorted it myself on the spot quickly. Out of the total amount, I picked out about 25# of lead. It is mixed tape weight, bare lead clip on and coated lead. Most of this was old weights applied years ago coming off of rims that were getting new tires installed. All new stuff is Zinc (marked Zn), Lead Zinc alloy (PbZn - already recycled once weights), Steel (Fe marked) and then some sort of flexi heavy plastic stuff.
I think 60cents/lb isn't too bad if it's all clip on weights as there is very little scrap (just the steel clip) and mess. The tape weights have a lot of 3M foam tape attached and although not heavy, it is very messy/smoky to deal with! Coated weights smoke lots too due to the plastic paint finish! The best source is shots that service medium sized trucks. Tractor trailers use internal balancing but the medium trucks mostly still use clip-ons.