The bottles meh not really worth anything but it saves you having to drum them up if you need them. The keg and copper I would check local prices as to what they are worth. I am shocked sometimes what other people pay for copper but I think it is a function of geographic availability. I am thinking the keg is worth 60 to 70 bucks though so if you can get the copper cheaper than 40 bucks well then not a deal
Also you have to look at if you are able to cut the top and roll the copper to make a IC I guess.