DId a quick search on a local auction house, an UNC example is being sold for around 7,50$. I'm not sure about your banknotes grade but it's lower than UNC so it's value is also lower. There's a entire set of these starting from 1 up to 1000, the higher denominations carry a decent value in high grade. You could try to complete the set if you like it.
I collect and deal in ancient Roman coin. In case you're looking for affordable ancient coins or need any help with the coins you already have send me a message.