I'm not sure if we should ban it to the bin.
It's the rare date of two years, NGC list a value of $90 for VF grade.
http://www.ngccoin.com/price-guide/world/greece-5-lepta-km-42-1869-1870-cuid-19817-duid-62117
As a rule of thumb, I divide VF value by 2 for each grade downwards. I would grade this coin F (not looking at the damage), which makes $45. The damage would further reduce the value. In this case I'd go for a reduction of 50%, which makes $22.50. If you find the right person, which may take a while, you might get $15-20 for it, and that would seem fair to me.