I am new to domain trading. I have one question -
Would I be sued (i.e is it legal?) if I buy some .app domains related to some popular apps of my country and list their google play store and apple store link with some ads on those domains?
I don't know if it's illegal, but unless you have a trademark on those names, you're almost certain to lose them.
It's a bidding war. Someone already bid 249.99 for "his.app". Next step up is 499.99. If you buy her.app for 249.99, then both will cost 499.99.