The second Spa Resort chip that you have listed on your trader page is not obsolete. I was just there the other day. The thing with those two chips is one (The top) is used at the Spa Resort and the second one is used at Agua Caliente. While both casinos are owned by the same tribe, they used different chips. Both chips advertise both casinos, but I don't think either casino will accept the other's chips.

Thought you'd like to know.