You can try a search on the R-15 since it's been discuss a few times now. But the cost is pretty reasonable for what you get. You're getting a light weight, camo dipped gun with a fluted barrel plus a few extra add-ons. Camo dipping runs between $150-250 from what I've seen FYI.
The K-16 is a good gun from what I've heard. One thing to consider when buying and AR is to plan on buying a few magazines ($15-$25 each), then a good mount (I bought a one-piece mount from model one for about $70), a sling, a larger gun case, and a scope. I didn't really factor in all of those things when I built my AR. I ended up getting a kit from Model 1 and putting it together. Here's what mine cost:
Kit w/few upgrades: $629
Stripped lower from Essential Arms: $90
Scope mount from Model One: $65
Nikon Prostaff BDC: $126
Hard gun case (sale): $18
Sling: $15
Total: $943 ($224 was just for accessories!) OUCH!
I didn't expect the extra expenses but I am glad I went the route that I did. I do plan on getting a new buffer spring and a trigger job which will add a little more but I'm happy for now since I'm broke... /ubbthreads/images/graemlins/smile.gif
Here are the results.
this is one of the first groups I shot with it. Haven't even broken it in or done any load development.
I think that whatever route you go you will be happy. AR's are pretty fun and most are pretty accurate from what I've seen.