The adverts at the top of this page are our patrons, but I think only three sell FTA equipment retail.
Those would be SatelliteAV, Sadoun, and GoSatellite. *
Any of their web sites would have complete systems available, with receiver, dish, LNB, ... and motor if you like.
Some include coax, cabling, and other accessories.
If you have particular preferences in equipment, features, or performance, post that, and we can help you focus on particular hardware.
If you've looked at some (eBay, local, or other) offers, describe them, give a link, and we'll critique them for you.
That way, you'll make an informed decision and purchase, and wind up with a nice system.
hints: a dish of 30 to 36" for starters, linear LNB (not circular), a receiver with blind scan is a wise investment.
* Fortec and Invacom make the stuff, but don't sell retail.
DishStore sells equipment if you want to subscribe to Dish Network.