I get what you're feeling. How long have you had the
Mini 2?
I just bought my
Mini 2 Fly More combo ~4 days ago and it arrived 3 days ago so far only had 1 flight - my 1st flight and that wasn't ideal as it was getting dark after sunset and close to 'no fly' night time period. I'm also limited by the fact I work nights mainly so sleep during the day (hours allowed for drone flying heh).
But I have a purpose for getting
Mini 2 for the long term - one being getting my roof check/fixed/inspection and getting solar panels installed and so nice excuse to get
Mini 2 to check the solar install etc

Any additional flight time would be a bonus - though I live in an area so close to a control tower airport's no fly zone - just on the border LOL
Guess you need to figure out why and what purpose did you buy the
Mini 2 for?
As to returns, I guess it would depend on eBay seller's return policy.