When I first got back into collecting, a 1906D Liberty Head $5 gold coin; it is graded Unc details by NGC. I know cleaned coins are worth less than uncleaned, but is it worth only spot, or any more than this? Would I be better off putting the $$ I could get for it towards, say a 1/4 oz proof gold eagle, or an uncleaned $2.50 gold piece (I'm looking for investment guesses).