There was no confederate money in 1851.

A genuine 1851 Seated Liberty silver dollar is a rare date, worth a few thousand dollars even in poor condition. If it's an 1851 Indian Head dollar, then what you have is a Chinese novelty coin, and it's not worth anything.

For the series of US Large cents (1793-1857), 1851 is the highest mintage year and is not rare or even scarce. Coins in average circulated condition have retail values of $15.00-$50.00

Please see the Related Question for a detailed answer.

1, 3, 617, 1851.