I have #3732. I just checked out ebay and there was one listing for about what I paid for mine. Lol the only headphone I have purchased that has maintained its value.
ETA:
I think the driver you listed is for a regular 702. The AE uses a different driver than the original 702 IIRC.
ETA:
Why then there is such a big difference in the price? 38 dollars for the K712 and 18 dollars for the K702 -
https://www.fullcompass.com/prod/514206-akg-2400x00090-dkk45-capsule-for-k712
https://www.fullcompass.com/prod/551653-akg-2400x00070-driver-for-k702
Probably some better ones are selected for more expensive models.
I think the driver you listed is for a regular 702. The AE uses a different driver than the original 702 IIRC.
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