There are NO spot meters available that cheap. None. Even the 5 degree attachment for a Minolta incident meter will cost you $50, and then you'd need a Minolta incident meter (Autometer III, Flash Meter IV, Autometer IVF, Flash Meter V, and Autometer VF) which will add $100-$200 depending on model and condition. A spotmeter will cost you $200-$300 for a good one.
Lol I was afraid I would get that response. I have a decent incident/flash meter and believe it or not I have a metering app on my iPhone that meters just as well in most situations. I just wanted to try to do some more precise zone system type exposures. On to fleabay I suppose.
I would strongly recommend a 1° spot meter; 5° has too much overlap. In either/both cases, a spot meter will be difficult to obtain for $50. For $500, yes, that's very likely.
Hey Collin, a guy in the camera club has one, and I'm not sure he uses his. Don't know if he wants to sell, but I think I'll see him tomorrow night; I'll ask.