Perhaps the savings for 9mm aren't what you are after, but as soon as you start doing calibers like .44 mag or .45 Colt, the saving are exponential. WELL worth starting a hobby such as reloading.
Great point ! Using 9mm as an example doesn't represent potential cost per round savings of reloading really well. I load more for .44, .41 mag, and .357 sig than I do 9mm.
Besides, as others have said, it is enjoyable for me to do it. I enjoy reloading almost more than shooting it. Nothing like making something that works better than what you can buy! Come one USPS!
Time is money. It must be something a person enjoys. Otherwise, it will seem more a PITA and if you calculate your time spent, whether it's worth it or not might come into question.
And about USPS... If someone wonders what the bigger bang for the buck is ( reloading your own or buying factory), just watch the USPS drivers face when he lugs a $ 150.00 dollar order of cast bullets from Missouri bullets and you'll know the answer.