I don’t know what differences (if any) exist between the Panasonic DMR E75V and the Panasonic DMR EH75V. (Mine has the “H” included.)
But, just fwiw >
When I search on eBay for “Panasonic DMR EH75V” (with the “H” included), your listing does not show up in eBay’s search results list.
Also, when I search for “Panasonic DMR E75V” (with no “H”), your listing does indeed appear in the results, but some of the Panny DMR EH75Vs are then missing from that search result.
By no means am I an eBay expert, so I don’t know what (or if?) to advise. – Just thought I’d let you know that perhaps some of your target audience/market may not be seeing your listing.