1 DeerRunSheepFarm.com is another site that sells sheep. 2  This particular farm also sells ewes and rams aside from the usual sheep. 3  The price of the sheep depends on how old the sheep is, and it can cost anywhere from $250 to $375. There are several varieties of sheep available and this can also affect the price. 2  Other factors that can change the price of sheep are their age and gender. 3  On average, expect to pay anywhere from $225 to as much as $400 per sheep. 4  Most sheep breeders use the internet to advertise the animals they sell.