@Talosian,
Can you tell me what VPN you’re using? Additionally – is it safe to assume that if you’re not using the VPN, the prices display correctly?
@Talosian,
Can you try clearing your cache and site data for ebay.com specificially and test again to see if you get the same results?
Visit ebay.com, then, in the address bar: Lock icon --> Site Settings --> Clear data
Make sure you refresh the page after clearing the data.