Grid Autosport on sale via Steam store, $9.99USD. Some will like it some will not, but good bang for buck I say.
Also available is the Grid Autosport season pass for $7.50USD, which will provide all the DLC to date (8 in total).
Ends Friday at 10am Pacific Time.
This will go well with my motion simulator. Just need to upgrade everything around it though, like the 9 year old computer.
Apparently (reviews say) Grid 1 > Grid 2 > Grid Autosport. Also the cockpit view (one of the most requested features from the first 2 Grids) is crap "Cockpit view is low-res, blurry, and the needles don't even move". Personally I would just get Shift 2 Unleashed for $5 which is very good.
The racing feels slow. Also don't assume it is a 'simulation'