My Pricing Method:

^{All may depend on the breed.}

Base Color:
Black (0)
Blue/Chocolate (+1,000)
Isabella (+2,000)
Under Color:
Red (0)
Fawn (+1,000)
Cream (+2,000)
Silver (+3,000)
Agouti Pattern:
Sable (0)
Grizzle (+1,000)
Points (+2,000)
Saddle (+3,000)
Solid (+4,000)
White Coloring:
No White (0)
Irish (+1,000)
Piebald (+2,000)
Extreme Piebald (+3,000)

Brindle, Merle, Roan, Ticking, Greying, Steel, Faded Color, Mask, Undersides, etc.:
+1,000 each (unless very common in breed)

+3,000 for each excellent
+500 for each HH
+100 x each level

lala = + 2,000
Lla = + 1,000
LL = 0
lla = 0
Ll = - 1,000
ll = - 2,000

-3,000 for each Fair
-1000 for each previous breeding (females)
-500 for each hh

x by xp multiplier rounded out (ex. 1.133x = multiply by 1/do nothing, 1.697x = multiply by 2)


Same method for stud fees, but divide by 2 maybe?