If he/she fogot to pay the renewals, it's his/her bad luck. Value, I would say in the Low $xx range, but maybe the person's desperate for the name & you could ask for more
I have similar domains for sale for 7$. Not much interest in those yet. I believe the value of your domain will increase, but I would've sold it for 20-30$ even if it's a "semi-enduser-sale"