Looking at a Cub Cadet and need advice

I went and got a friend of mine and his boys into the tractor scene. He called today and wanted me to go with him to look at a Cub Cadet. What we have is a Cub Cadet Corporation 582, not an IH. It has the 16hp twin engine, deck (bent but works), snow plow in very nice condition, weights and chains. My buddy wants to eventually put a tiller on the back of this tractor. Assuming he can do that, is the hitch hard to find? My other question is on the hours. This tractor has 1322 hours on it. How long does this engine have here on earth? It starts and runs very well. No smoke at all. Idles very well too. It has the creeper gear in it also. The guy wants $600 for everything. Personally, I don't think the price is out of line but my friend doesn't want to pay that much. Can anyone help me with anything I have listed or anything else that we should know before we go back? Thanks in advance.