Ironically, the cheapest phones available all tend to have Dual SIM Dual Active, usually because (in Europe at least) many have a second SIM card specifically for international calls.
So yes, it's "too expensive" because it's higher than $0, but it's not "too expensive" as in it would cost a lot.
So yes, it's "too expensive" because it's higher than $0, but it's not "too expensive" as in it would cost a lot.