I believe, we can do a bit of a cooperation about the farm gate pricing if we only know the prevailing price around us. Most of the time, (in our own locality) price is being dictated by biyaheros or vendors. Although, supply and demand should be the prime factor but biyaheros tend to twist that always to their advantage.
we have once conducted a survey in Bataan and some area still go for bultuhan system/estimation in pricing their animal. So in the end most of them have little to no profit at all.
It is really a great help if you can at least know the price in your area so you could not be fooled by biyaheros.