$1800-1900 for a complete swap is going to VERY hard to come by. A complete swap with just about all you need to run the motor will usually run $2200-2500 on average.

There are plenty of incomplete S13 motors out there but the cost of the other necessary parts is somewhat high...and more expensive than buying a complete setup the first time.

Heavy Throttles prices are about average for what I have seen for a clean complete engine.