Uh, not exactly .... "Morgan Stanley" is the name of a Wall Street financial company. The coins you're referring to are just called "Morgan" dollars after their designer, George Morgan.
Please see the Related Question for more information.
1898 isn't a rare date for Morgan dollars in circulated condition. Look on the back of the coin to see if there's a small mint mark letter above the DO in DOLLAR. It may be blank or there may be an O or S.
Numismedia lists the following approximate retail values as of 08/2010:
No mint mark (Philadelphia):
Very worn condition - $17
Moderately worn - $19
Slightly worn - $21
Almost no wear - $23
Uncirculated - $34 to $6,310 depending on quality
"O" mint mark (New Orleans):
Very worn - $17
Moderately worn - $19
Slightly worn - $21
Almost no wear - $23
Uncirculated - $34 to $30,630
"S" mint mark (San Francisco):
Very worn - $17
Moderately worn - $23
Slightly worn - $32
Almost no wear - $96
Uncirculated - $230 to $29,380
DISCLAIMER: The values quoted are the best available, but may vary due to market fluctuations. Also the wholesale (buying) price of a coin will be less than the selling (retail) price. A reputable coin dealer will be able to give a more accurate valuation based on inspection of the coin.
1889-O is not considered a rare date for Morgan dollars, until you get to the higher uncirculated grades.
In circulated condition, it's currently worth about $22
An average uncirculated one is worth about $120
6-23-11>>> Assuming the coin is circulated, the 1880-S Morgan dollar is considered common. For an accurate assessment of value the coin needs to be seen and graded. Most coins of this type have seen heavy use and show a lot of wear. In general retail values for low grade coins are $36.00-$37.00, better grade are $38.00-$39.00 and coins showing almost no wear run from $40.00-$44.00. Values are a market average and only for coins in collectible condition, coins that are bent, corroded, scratched, used as jewelry or have been cleaned have far less value if any to a collector or dealer.
In circulated condition they are worth on average $16 to $20. 1889 Morgan dollars struck at Philadelphia are not rare dates.
The value of 1889 Morgan silver dollar replica ranges from $23.01 to $26.76
The most common Mint State grade for an 1889 Morgan dollar is MS-63 and retail value is $53.00
The 1889 Morgan dollar is very common, depending on the grade retail values are $17.00-$26.00 Uncirculated coins sell for about $35.00
The 1889 Morgan Dollar is common, average retail value is $23.00-$31.00 for a example in circulated conditionRead more: Special:Contributions
The average retail value for a 1889 Morgan in the grade of F-12 (Fine) is $19.00
The Peace design was only issued from 1921 to 1935. If you have a large silver dollar dated 1889 it's called a Morgan dollar. Please see the Related Question for more.
Assuming the coin is circulated and has no mintmark, the 1889 Morgan (not Liberty) dollar is a very common coin with retail values of $16.00-$26.00 depending on the grade of the coin.
The 1889 Morgan Dollar is common, average retail value is $23.00-$31.00 for a example in circulated condition
The 1889 Morgan Dollar is common, average retail value is $23.00-$31.00 for a example in circulated condition
The value of a 1889 US silver dollar can vary depending on its condition, rarity, and any unique features it may have. As of current market values, a circulated 1889 silver dollar is worth around $23-$30. However, if the coin is in uncirculated or highly graded condition, its value can be significantly higher.
8-7-11>>> Assuming the coin is circulated and has no mintmark, the 1889 Morgan (not Liberty) dollar is a very common coin with retail values of $36.00-$44.00 depending on the grade of the coin.
On the face, directly below Liberty's profile.