i agree that you should get it-if he's fiesty and healthy he should do okay. you could probably give him a better chance at life than anyone else-he would probably end up dying at the lfs.
you all have bigger hearts than I do (or maybe its just more aquarium space). I feel bad for it and all, but I certainly wouldn't want to house, feed and take care of a fish like that for the next 10 years.
buy all the feeders too, you never know what might happen to them. But seriously, I'd take him if he was free and try to find him a good home, but I wouldn't pay for him.