Military Vizualisation (MilViz) brings their old school -and newest product!- 737-200c for sale at simMarket. It’s a realistic and complete package to let you fly this old bird manufactured by Boeing after the 707 and 727 in the 1960’s.
It features systems and avionics, accurate flight dynamics by Tom Falley with the help of real pilots. And you’ll have two panels versions to navigate : either the FMS that you can update with Navigraph Airac Cycles, or a SP77 with no FMS. It works for FSX, and is compatible with P3D but without official support.