Sorry to hear. On the street, in the underground economy, a newish fancy phone is worth $100-$200, an older one is $50-$100.
Scumbags snatch and run, pick them out of purses, break into cars, grab them right out from under your nose from restaurant table tops, the total sucker move "let me borrow your phone" then run, etc... to get them. To them, a phone = $$$$.
The lesson for others to take from this is don't leave your phone anywhere you wouldn't leave a $100 bill.
I am frugal when I can be, so I am able to be extravagant when I want.