This is a private listing, says it is shipping from the UK and only to the EU. Price does seen a bit low. That's a little over $200 off the current price. But I have no idea what the markup is from DJI.
Thanks for the heads up. As someone interested in buying the P3 I looked into this listing a little further and discovered this is not a private seller on ebay. It was their June delivery that raised the eyebrow. They are a business called besthobbysite.com who is one of those Hong Kong online retailers that ship worldwide. If you buy direct from their website the P3 Pro is £827 but you'll have to a hefty shipping cost on top which will more likely be hit with a 20% VAT plus processing fee on the way to your door. However I did spot one their delivery options for this is ship to UK warehouse then ship from there to your door for £56 (10-20 working days).