If the long log in the middle is 16', I'm guessing a Half Cord at most. It is very common for people to over estimate how much wood there is, then suddenly the wood is gone faster than the wood rack fills up.
As to the Value as firewood, you put it well saying that those logs are "FOR" firewood , it ISN'T Firewood, until it is Cut, Split,Stacked,Seasoned and where it will be burned as Firewood.
The real Value in Firewood, ISN'T the Wood itself, but in Making it Firewood.
The labor of processing it and storing it a year to Season is where the real value is added in Firewood
Looks like a nice cherry log in there. I like the cherry for smoking. Firewood 1/2 to 3/4 cord...as the others have mentioned not much value...cut, split, dried and delivered maybe 150 bucks.