Factory 8.75 E-locker 3.91 third member/carrier

Unknown miles.
I purchased it from Ebay and was listed as a 4.88 gearset. It is factory 3.91s. Complete and gear wear look good, nothing abnormal and pinion seems tight. Included is a factory toyota gasket as well. $650 or make offer. I am willing to ship if needed, we will just need to figure it out. Upstate NY.

EDIT: ECGS used to pay $800 for these cores, but that was just a here say forum post. Full disclosure, i got it cheaper than my listing. The difference between their fully assembled and their regear assembly/parts option $835. Their core charge is $500 so i priced it in the middle. This is a few hundred cheaper than Ebay options as well. I am trying to recoup my money as the seller doesn't accept returns even though the product wasn't as described.

 

Location?

 

Updated, Upstate NY. Thanks