1818 Maryland Red Embossed Revenue Stamp Duty / Tax - 30 Cents Unused Sheet of 4

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1818 Maryland Red Embossed Revenue Stamp Duty / Tax - 30 Cents Unused Sheet of 4:
$1999.99

This is for an extremely rare sheet of 4 unused 1818 Maryland Red Embossed Revenue Stamps for Duty / Tax
The value for each is 30 Cents.
This stamp act that imposed this tax was held unconstitutional by the US Supreme Court. The Act was supposed to have 6 other denominations that haven't been seen.
Condition is mint and tipped to a piece of paper.