Booster boxes...what's the difference

[adventus]

I see some places selling booster boxes as 'Theros 1a' and 'Theros 1e'.  What's the difference?  Can you tell by looking at them?  Is there a code on it?

[Agrus Kos, Enforcer of Truth]

I see some places selling booster boxes as 'Theros 1a' and 'Theros 1e'.  What's the difference?  Can you tell by looking at them?  Is there a code on it?

I think that this is by printing. 'Theros 1a' is likely the first printing of Theros and 'Theros 1e' is likely the fifth printing. If I am right, then they are essentially the same.

[adventus]

What's odd is I'm seeing 1a selling for cheaper.

[Birdbrain]

What's odd is I'm seeing 1a selling for cheaper.

they probably have had the Invintory longer and so are trying to get rid of it. Kind of like how going out of business sales get cheaper as time goes on, because they need to evacuate the building by a certain date