You could by a springfield stnd for around $1300. Or you could get the parts slowly and build one up. You can get brand new cast recievers for $399, barrel for $200, oprod for $175, trigger group for $150-$200, rear sight for $75-$100, bolt for $150-$200, and gas system for $125, and all other small parts for another 100 or so including a cheap stock.
There are alot of new commercial parts manufactures out there now that are building quality replacement parts for the m14 so I actually see prices coming down some in the near future.
If you want links to these parts let me know.