I'm looking for help valuing this coin. I've found them online with different values, some very high. I'm trying to find a reasonable value.

1979 D Susan B. Anthony Dollar, Error " RPM " REPUNCHED MINT MARK. Actual coin, this is the coin you will receive. Shipping will be Priority Mail. ***** Manufacturing errors might be annoying when it comes to most products, but they can be a massive moneymaker when it comes to collectible money. Errors increase the value of collectibles because a limited number go into circulation before the error is spotted and corrected.