Slag Glass Table Lamp Native American Motif Pair

Both lamps need some work. One lamp shade is in good condition. It has one piece of glass missing but it came with the lamp. The other lamp shade is broken at one bottom corner but can be easily braised and unnoticed. This shade needs replacement glass. Both bases are in excellent condition.

The shade motif is a Native American riding a horse. I don't know much about these lamps other than they came from an estate sale in the Pacific Northwest.

I am interested in knowing their current value, estimated repair costs, and final value after repairs.