In the semi-local pet shop there are two African Greys: a CAG that's 7-years old and allows skritches through the bars but is apparently cage territorial, and a 10-40+ year old TAG that doesn't appear at all hand tame and outlived its owner. The CAG is a sweetie pie but I'm gravitating toward the TAG, partly because that's the species I originally wanted and partly because I love projects (which may sound calloused but it's true, I prefer things that take some effort and work). The TAG comes with a cage that's likely as old as it is, based on the wear and tear, but if I were to get it I'd definitely hold off on moving the bird to another cage until it was much more settled in my home.
My question is, what exactly am I looking at when adopting an unknown older bird? The pet shop staff knows next to nothing about this bird, other than it's been there a few months and apparently outlived its owner. It has an open-band on its leg so I'm assuming it's wild caught, which could easily make it older than me by quite a bit. I don't worry too much, I'm going on the assumption that it could still go another 10-40+ years easily and I am willing to work with a recalcitrant bird (and I get my lovins from my conures, so don't necessarily "need" a lover [although I wouldn't mind!]).
Anyway, long story short, has anyone ever adopted a much older bird? What were your experiences with taming it or improving its quality of life? Any advice for a Grey newbie who may be jumping into something outside her comfort zone?