Well, MM...
I read your thread and all the responses. It's funny because I originally had thought a 50/50 split would be fair, granted I even find anything at all. And I also had considered just having him take the first pick... since it's his property, and maybe giving up a good find would buy trust and an open door for his property, and maybe even an open door to other properties through him.
I guess my only scenario, though unlikely, was if I were to find a nice belt plate or a gold coin or something. Something with such a historical background would be nearly impossible for me to part with, knowing it's possible that I might never find another.
Then again, there's always the chance where he might be an older guy that's just interested in having a few bullets or something like that, knowing they came from an encampment on his own land.
Guess I'll take along some agreement forms (just in case), and play the whole thing by ear. If he were to want to follow me around (not in a friendly way) or were to be aggressive in wanting my finds... I would just tell him my detector is acting up, apologize, and then leave.
Bran <><