BCM upper $439 - http://www.bravocompanyusa.com/BCM-M...-urg-m4-16.htm
PSA lower $180 - http://palmettostatearmory.com/index...category/4284/

Total $619. Add another $70 for a rear buis, handguards and a plain jane charging handle (though I'd recommend a BCM gunfighter if the budget allows). I'm sure you could get those items used in the Trading Post for much cheaper if you are patient.

Now you have a high quality AR for an entry level price.