Is it normal for shipping from Cali to AL is 7-10 days?

Ok so this guy is suppose to ship an iphone to me and at first he said it should take 3-5 days and now he told its going to be 7-10 days. Is it normal for me to get a package from California in the duration of those days? The shipping is usps and it was free so I'm pretty sure it's the cheapest shipping I got. I live in AL.

The cheapest rate 2 to 8 days…

https://www.usps.com/ship/service-chart.htm

regards pops.