You are right but ,
Who says someone only have to depend on one persons price check opinion or depend on pc at all
If you are not sure ask for offer , it this case u dont have to sell it if u dont satisfy with the offer . And why dont get many opinions as possible before starting a auction . There is no need to instantly set an auction for a poke the moment u caught it .
And what if u set an insta later in an auction and sold the poke and then the buyer sells it for a higher price than he bought .
In both cases u cant be sure of the price of a poke . Whether u set insta later or earlier .