When I was buying them by the bucket full, I was paying $20 a bucket.
Last time I bought some, I found a tire shop that had a 55 gallon barrel FULL of them, and gave them $200 for the whole thing. Estimated weight was 2,000 pounds.
Lifetime supply.
The local scrap metal place in Portland, Maine offers to SELL wheel weights for fifty cents a pound, and will give you same value credit for any zinc and steel weights that come from the batch. That's not a bad price for someone looking for a regular supply.
Finally, a few folks have reported that they bring used range brass to the scrap metal place, and SWAP it for wheel weights. Something like a 4:1 ratio. One pound of brass gets 4 pounds of wheel weights. If you have endless access to brass, it's another way to get wheel weights cheap.