And, I add from every day experience, for projects that you don't want to take any lucky guesses, there are always places where people that make a living out of scanning photographs (and a lot more), using the best equipment available. I do not know international prices, but when my A4 scanner (which was, by the way, a Heidelberg (?) that set me back something like $ 2500 three years ago), is not up to the job. Or I am not satisfied, I am the first to hand out my photograph to an external specialist that does the scanning for, like, $ 25. There is a reason why there are still scanners being sold for prices that reach far beyond what anyone of us would want to put on our desk. Better results. If someone wants the best (that would be you then), get them the best. A good price for good work should provide room for buying a good scan. I think.