Hm... could be Dutch, but it would be awfully large for one if I'm looking at the photo right. Don't they usually only get to be about a pound? However, photos can be deceiving.
The earlobe does look pale to me, but still red (at least on the bottom--no, I'm not talking about the wattle
).
Still, it looks as if Ideal carries both OEG and Dutch, so coming from a feedstore, he could be either breed, you're right... depending on size and earlobe color. If he's a Dutch, they carry a variety called "Cream light brown," which looks more or less close to his coloring, although it's from a picture rather than a photo, so I can't tell if it would be right on or not.
On the plus side, looking at the Ideal website, it appears that all their OEG bantam (pictures) have slatey legs, so that would be typey for that breed, too.
OEG are 30% or so larger than Dutch, so I guess size would matter in making a determination... stance, too!