Hi. See an LD owners' group web page for some answers. http://groups.yahoo.com/neo/groups/lifewithalazydazerv/conversations/messages
Once a member of the group, you can view the files section that includes prices for used LDs. With respect to the generator, how much do you expect to use it? I don't use mine very often. With respect to upgrading your solar, I would wait for a bit. You are considering an older RV with older equipment. You might need to repair/replace something more important in the coming months. Good Luck, Bob