I worked in multiples games genres and have experience with all of what a game needs : Backgrounds - Tilesets - Characters - Animation - Isometric - Portraits - Items.
Responsible, I'll maintain contact with you and provide a trello link to show you updates of your commission, even for the smallest commissions.
Usually my prices changes depending on the difficulty but this is a guidance of how much it could be:
Character with at least 1-2 actions depending on the game perspective:
<= 32x32 Characters : $15~(for the base idea)
=>48x48 Characters : $25~(for the base idea)
Per frame (depending on the complexity) could be : 3$ to 8$
Tilesets : starting at 35$
(The prices are just an example of what it could be, everything depends on the amount of details you want.)
Please provide a description of what do you want with references to have a better idea of what you need.
Replies