Finally talked myself into doing one of these.
For full details or links to full examples: http://www.furaffinity.net/journal/2630811/ or just take a look through my gallery there on FA until I get this place up and running.
As for the note on Ref Sheets:
Starting price - $15
This will get you 1 view, color swatches and a text saying whatever you like.
Each additional view/pose, +$5
Each additional headshot, +$3
Each additional accessory/extra stuff, +$2
No previous ref to work off of, +$10
Ex. - http://www.furaffinity.net/view/6239260/
http://www.furaffinity.net/view/6418164/
http://www.furaffinity.net/view/7910158/
I'll probably add more to this in a little bit as I think of it.
If you have an questions, feel free to ask.