With range lead (fired bullets collected from gun ranges), it costs me a little propane to melt a 40 lb batch (a dollar or two). Add some tin solder and a little antimony, since range lead is generally pretty soft and doesn't fill well. ...And it costs me, generally, less than a penny per bullet. ("Generally" because there's a big difference in yield and per-bullet alloy use between .312" 80 gr HBWCs and .475" 480 gr WFNs.)
Add a gas check (call it 3 cents), since I use them on rifle and most revolver bullets, and that jumps to 3-4 cents per bullet.
With other alloys, such as Linotype, medical isotope containers, wheel weight ingots, etc., I'm usually invested for $1 to $2 per pound.
So, a 200 gr bullet will be 2.8 to 5.6 cents per. ...Plus gas check, if used.
Buying commercial alloys is more expensive, at $3-$5 per lb; but you don't have to mess with mixing alloys or using mystery alloys (like range lead and modern wheel weights).
One can still drop 200 gr bullets for under 10 cents per.
Using Rotometals certified Lyman #2, at $2.72/lb, for example, results in a 200 gr bullet costing 7.8 cents in alloy.
wheel weights are still prime material for casting, however, be aware that nowadays many shops won't give them away or even sell them, not really sure why,..
When I checked around while living in Utah, I got two answers from shops that said no:
1. Some one else already had dibs.
2. They were under contract with the company they bought wheel weights from to recycle everything.
I haven't checked here, since the scroungers are cut-throat and much more serious (for brass, range lead, and wheel weights).