Need some ideas/opinions on Original Piece of Art

Posted in Off Topic

I was recently commissioned to do a piece of art for this lady at my school. It's for her 6 year old son who's birthday is coming up here shortly and it has to be Spider-man. Originally it was going to be a watercolor painting but after discussing with her some ideas we settled on digital art instead. So now it's going to be a Poster with my art on it.

What I was wondering is:

1. How much would you pay/charge for something like this? I was thinking something in the $200 range, is that too much?

2. What's something cool that Spidey could do that wouldn't feel repetitive? Maybe hanging some thugs off a line and getting ready to swing... I don't know.

She specified no villains, just Spidey. I have some ideas but none of them are sitting well with me. Any ideas or contributions would be greatly appreciated.