Average Price on The Following

[NYREDS]

Oil & gold trade on a world market & as such have established values at any given time. This is not the case with chickens or much of anything else.
The value of a chicken is arrived at by agreement between buyer & seller. A chicken that sells for $1 is worth $1. Achicken that sells for $500 is worth $500. As far as I know there's no recognized appraisal system for determinating the value of a chicken.

 

[Pathfinders]

Or as my gandpa used to say "A thing is worth what a seller can get for it."