I have changed my reference sheet model. ^^
so I have only one example:
https://www.furaffinity.net/view/39924817/

Price:
$80 - 2 fullbody + 2 headahots + an important thing in your design

additional fullbody - $10 (Max 3 fullbody in a ref sheet)
Additional headshot - $5
additional important thing - free
Designing a character- $20

Note me if you're interested ^^