I paid £ 100.00 for my female when she was about 4 foot long, but she was lurvely, peach bellied, just gorgeous.
In a shop I'd expect to pay between £ 50 to £ 70, in a forum I think it's gonna be hard to achieve more than £ 50.
Anyway, a good picture always help in the sale process, because if you capture a good picture, people may have love at first sight and may pay a good money to get it.