I just received the headlamp I ordered and I'm pleased. I paid $4 + $6 shipping.
The only catch to this is that one might assume that it uses AA or AAA batteries, but it actually uses Lithium 18650s. I'm okay with that. They're rechargeable, and I can order four with a charger for $16.
I gather that this is a VERY bright lamp, and it is well constructed (though the real test will come later, when I try to turn it on and find that the power switch is cosmetic).