I got 2 dd 3512's with e motor and carbon fiber dust caps. Wanting 300 per sub plus pack and shipping. They are like new. I got them from a shop that had them on display. Only marks are like chipped paint on basket. Anyway heres the pics...
look more like D motors to me. Es have triple stack as well as a totally different/new backplate, the ones you have appear to be D with E soft parts and possibly an E sticker since it has upgraded soft parts. I don't know for a fact the soft parts are upgraded, but I do know for a fact that is not an E motor.
that is what an E motor looks like. not a post dump, just a better description of what is being sold.