A lot of places seem to be clearing the M1P of late, so it could be genuine, but yeah that is very cheap.
If genuine DJI, watch out not old stock, where batteries may have run down to zero charge and they may not be able to be revived.
Sometimes a year on the shelf and they could be doa.
Also watch out for those Mavic copies on eBay.
They use the name Mavic pro, and even use DJI photos in their ads, but these are usually a lot less in price as they are pretty basic in flight terms.
Some knock off factory in China is pumping out hundreds (if not thousands) a day.