Have you checked this out with a louper?
There are 3 varieties of mint mark here - D, Weak D, No D
Looks like even in good condition - good money for the No mint mark variety.
I can't tell in your picture whats below the date.
On Ebay 1922 with weak D in "Good" Condition sold for $50-60
The No D variety in "Good 6" condition sold for $450
Sold listings not just what someone was asking.
Even normal D variety is worth $10 - I'd keep it :)
Better pic of mint mark would be good.