That doesn't sound too bad. What model is it? I'd also make sure the barrel threaded for chokes, those 28" VR barrels are amazingly versatile with a selection of different choke tubes. I personally use a 28" barrel with a full choke tube for trap shooting. I have a friend I always meet up with at the gun club, and she uses the same setup.
I wouldn't be shy about checking out used 870s in your area, either. You may be able to find a similar build, but in a higher-end model for less than a brand new gun. 870s are built to last; as long as the previous owner didn't abuse it, buying a used 870 just means someone else has already gotten it all slicked-up and broken-in for you.
Pick up a basic, short barrel for about $100-$150, and you'll have a pretty versatile setup. S&J Hardware is getting in some
18.5" barrels next week, and J.D. has a
nice 20" blued police barrel up right now on GunBroker for a good price, if you're willing to jump on it.
If you want to add a magazine extension to one of those guns, you'll have to do a little work in removing the detents from the magazine tube, but there are plenty of people here who can give you advice with that.