eBay have only ever been hacked once in 25 years -
The only time it happened was in about February / March of 2014 Ebay was hacked. The site was hacked. The hackers were able to get the passwords on quite a few accounts. However that is encrypted information and the hackers were never able to break the coding, so they never got to our more sensitive information. So no one lost any financial info and Ebay did have some as sellers put in auto payment information for the Monthly Seller Invoice and some sellers had credit cards as a back up funding source. But the Ebay security held up to this attack and sellers were no worse for the wear.
I regard them as safe as any bank, but with all online purchasing and selling there is risk.
Use a seperate account for eBay paymetns to be received - and keep less than $100 in it if it makes you feel more secure.
Over the course of your lifetime I am sure you have had to provide your birthdate and license details to other payment processors, such as your bank. Adyen is the processor for eBay and they are registered in Australia
