Would you look at this

My favorite rifle is without a doubt an AR15. It is handy, accurate, and can serve many functions as far as rifles go.

Many people purchase an AR15 (or almost any gun) from a store. Prices are usually $1000 and up.

However, for a smart person, the better choice is to build the AR15 you like. Here's a link to Del Ton - a quality manufacturer - that is selling rifle kits for $465. All one would need is a stripped lower receiver (the actual firearm, per ATF rules), and the ability to build one.

And here's a link to Palmetto State Armory - another high quality manufacturer - and they sell rifle and carbine kits starting at only $499. Again, one would simply need a stripped lower to build a complete firearm. 

I know of a place locally that sells stripped lower receivers for $95 (that price includes background check and taxes). This means you could own an AR15 for under $600 right now. Not bad!

What's more - from the link, you can get a carbine, a rifle, and have several other options to choose when building your rifle. Pretty neat!