Until the VIN is known [requested], no conclusions can be made about where it fits in. Just a few weeks ago, the latest Norwood Z11 known to the CRG [N644261] auctioned at Mecum Kissimmee. That car was final-assembled on or about May 16th; there was no 05B. Within a few hours of that car, units with 05C tags began to enter final assembly. For a day or so, 05A and 05C units were simultaneously present in the body bank and final assembly.
The eBay Z11 was a well-optioned, expensive car. With a confirm # of 341263, the dealer order was definitely expedited. Other dealer orders in that range have 05E tag dates and were final-assembled around May 29. There is a slight possibility the eBay Z11 has a lower VIN.
Body tag date is only a general indicator of final-assembly date. Cars were not built in VIN or confirmation # order.