Unless you're reloading other calibers along with 9mm, or are a high-volume shooter, then I'd say don't do it.
With that said I just got a sweet 550b set up yesterday and I'll never look at factory ammo again! I haven't broken it down yet, but not counting all the reloading equipment, it works out to about $200/1000 with plated bullets. I haven't really shopped around for bullets, but the last couple thousand I got worked out to about 12c a piece after shipping and taxes. I'm sure you could lop a few cents off somewhere. I picked up a case of the DA small rifle primers from CanadaAmmo from one of their sales a while back. Interchangeable with small pistol, so-said the manufacturer, I had to try a case for $125/5000. Wish I'd have picked up a few more cases at that price.
Reloading is a ton of fun, you can customize your loads to your guns, you can save money, lots of money if you're reloading some of the bigger bore pistol calibres, or any rifle calibres...but the initial investment is usually a fair chunk of change. Also, loading pistol cartridges on a single-stage press sucks.