I sell almost all the foals that are bred in my breeding farm. The initial price is always 500e more than what i paid for breeding. I usually breed within my own farm so the initial price is usually 3000e. When I don't breed within my farm I refuse to pay more than 500e. (the only exception being unicorn breeding) So sometimes the initial price is bumped up to 3500e. I then add onto that according to how rare the coat is and weather or not the foal is pure bred. Pure bred horse's prices get bumped up an extra 500e. Anything above 10% doesnt change the price, things between 7 and 10% bump the price up 200e, things between 5 and 7% bump it up 500e, and anything below 5% bumps it up 1000e.