Some background to the Eric Saga.
The 4th pic down in the Ebay listing is a St Peter/Sihtric penny which the seller found before his Eric. This was submitted to EMC (2018.0435) and PAS (DENO-FCA770) and eventually sold by CNG (https://auctions.cngcoins.com/lots/view/4-QVUN2/anglo-saxon-anglo-viking-hiberno-norse-northumbria-st-peter-coinage-circa-921-927-ar-penny-20mm-123-g-3h-swordcross-type-bmc-1-york-mint-struck-under-sihtric-ii-caech)
Also I uploaded a video superimposing/animating his Eric over the PAS one (YORYM-BA2295), at https://www.youtube.com/watch?v=_b1QpPVzrKM