That came out pretty nice. Seadog852 one of the first things you have to take in account is the venue that you are going to try to sell this at. Will it be a craft show and Art Show or just showing it to folks and hoping? I am making this point, how much you will get for that will vastly differ between the different venues.
How large is it? If it is larger than something say 8 x 10 then you can charge more. I have no idea what kind of area you are living in. This too makes a huge difference. Is the area Rich, Poor, on the coast, full of fellow scrollers, or completely void of fellow scrollers? Besides the cost of the material you used in making this you need to account for those variables as well as the time you took to make it.
In my area at the craft fairs that if it was not too large might sell for as much as $30 - $40. Thing is you set the price, if it is too high it will not sell however you have the ability to lower it if you feel this is what you need to do. A lot of folks use 3x the cost of materials to make up a base price and then add to that what they think their time might be worth.
Hope this helped.
DW