High odds that the answer is "not much". See the Related Question for a more complete answer.
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Check the serial number. The vast majority of Confederate artifacts are replicas and counterfeits, and that includes currency. Lists of known replica serial numbers can be found online, and such bills are worth next to nothing.
Enormous numbers of $2 bills were printed in 1976 for the Bicentennial celebration, so it's not unusual to find them with consecutive serial numbers. If they're from change, they have no extra value. Uncirculated ones might bring $3 to $4.
Without knowing the bills' date and series letter, it's impossible to estimate a value. Please post a new, separate question with that information. The series letter, if any, is a small letter next to the date. The fact that the serial numbers are consecutive doesn't add much to their value nor does the star indicating these are replacement notes. However depending on the date and series, those conditions combined with the fact that the bills are uncirculated could add to their collectability.
Bills with this error can sell for anywhere from $100 to $200 depending on their condition and how far out of sync the two numbers are. Mismatched serial numbers can occur when one of the counters that prints the numbers gets stuck and doesn't keep in sync with the other one.
In uncirculated condition, a 1950C $10 note retails for about $20. Serial numbers are generally not a determinant of value unless they're "unusual"; e.g. 00000005 or 123456789.