Hi Excal,
I would recommend you go to a Target store and take a look at them, you can get a really nice one now a days for what you want to spend or less… Does your son do any type or photography, or does he just want it to take basic but good pictures?
You can take a look around
Target Online Cameras to get an idea, but they have several others in the store and often run good sales.
Now here are two things to also consider
Memory cards, most cameras have a small internal memory so you will have to get a memory card. There are various different types depending on what camera you get, but the tipically range from $25-$80 bepending on the size.
Batteries, rechargeable “hi-energy nickel-metal hydride” work great. I have two sets that I rotate from the charger to the camera and I have been using them for a couple years now and they are holding pretty strong. Also you will need the charger of course they average about $30 for the set of charger with batteries, but it’s a good investment because a digital camera will eat through regular batteries very fast.