I have seen this so many times now.I also dabble in coin buying and selling and today I get a call from my friend who has relation with some coins...We set up a meeting and my heart just breaks.this nice lady had cleaned all her coins with what looked like a brillo pad!!!I know i am boring all of you but I need to vent somehow!!if she wouldnt have cleaned them like that she was looking at around 800 bucks.I just didnt have the heart to let her know all the coins were basically relegated to just junk silver value. Please if you have anything of what you might think is valuable just leave them alone.Also please do research yourself,as to value,there are many sharks who make a lot of moulah on the unsuspecting public.