The 1885-O Morgan dollar is common, in general values are $32.00-$38.00 depending on grade.
$27 to $4500 depending upon the condition of the coin.
Values for circulated coins are $17.00-$26.00 1885 is a very common date.
About $27.
42cents
About $150.
Below the grade of VF-20 whatever you can get for it or scrap. VF-20 an above list for $45.00 to $250.00 in MS-60.
A very common date and mint mark VF-20 value is $20.00
"DO" isn't a mint mark. The mint mark on a silver dollar for that year is on the reverse (tails) side, just above the letters "do" in the word "dollar."
In a circulated grade it has a value of about $30-$60 unless it bears a Carson City mint mark in which case it should have a value of about $600-$700. Higher grades command higher values.
One Dollar
about $25 depending on condition and mint mark
Look on the back above the word ONE in ONE DOLLAR No mint mark - from Philadelphia S - San Francisco O - New Orleans CC - Carson City