That's just a sketch, finished piece will be better. How much better? Depends on reached price:

up to $25 - coloured and refined lineart + celshading
$30 and higher - lineless fully shaded drawing
AB at $50 - background of your choice + cum version + lingerie version

Rules:
-any pony race
-female only
-canon or oc
-some outfit/accessories are possible
-paypal only
-payment within 48 hrs after the auction ends

For examples on finished drawings please check my artbook or visit my daviantart or furaffinity.
Good luck and have fun!