Both ebay/paypal and aliexpress are very professionally setup their buyer insurance policies, since 2002 I had issues with maybe two items I received, long back in years.
Usually new to ebay doing mistakes not understanding that a clean business makes both sides happy.
I sent an email both to a seller and to customer support and I got all my money completely back. I asked ebay where me to send the items back (meaning who is paying for shipping) they sad keep it or just give it away.
I remember the last one was last year, a Tokina lens (second hand for Canon DSLR) market value about $500, got my money back and the lens (with a scratch on front element) is in my drawer.
Aliexpress also refunded my money 3-4 years back I believe the wrong item (or wrong collor of the item) was in the box.
I know for sure the buyers protection insurance is working great, they want your business.