I'm going to play devil's advocate here a little bit. Mainly because I love this topic the way lots of guys around here love talking big bores and handloads.
Good deal to who? If the potential buyer thinks it is a good deal why didn't he take it? Could it be that it wasn't a good enough deal for him and his personal wants? I'd be THRILLED with a 50 inch kudu for my next kudu. Many guys would pass all day long on that size. Does that make them wrong for wanting a bigger kudu? Based on your reasoning above shouldn't they just be happy with that 50 inch kudu, or 54? Why are there guys who want to hold out for 60??? Silliness....
So what if it is $2k more for the proven track record? How about $3K? $10k? I'm sure there is a point that you would consider someone else, right? And yes, this inflection point is different for all of us.
How so? A weak exchange rate helps exports, and foreign hunting is an export product, even if it takes place in SA. Don't take this question to mean I don't think it isn't a really tough time for the indistry right now. I do, but not just due to the exchange rate. Imagine what it would be like today if the rate had gone from 11/1 to 6/1 over the last year. Everything else being equal no way that would have been better for outfitters.
And this is the key - supply, demand, and differentiation. Supply and demand are the base, but "value" for a product, real or percieved, is why any of us will pay more than rock bottom prices.