I believe that's a Summit Gold B4 from 2003-2004. It was the 2nd least expensive Summit available which probably still put it in the 1200-1500 range.
Be careful on Summits as they can be pricey to restore. This model for example has across over tubes in the middle of the burners, which led to a welded set of flavorizer bars that are more than $100. RCPlanebuyer doesn't even make a set for this model as there's so much work involved.
Also, the lowe firebox isn't a one piece cast aluminum like the Genny. Rather, it has cast aluminum side pieces and stamped porcelain coated front and rear pieces. 4 parts in total, but you can't buy them individually. The front tends to corrode pretty badly, both where the burner tubes poke through into the firebox, and up on the top front where the grates sit.
If you blow up the pic showing the grates, you can see a couple of spots where the front of this one has corroded.
This isn't to say that one should never rehab a Summit. You just have to be very careful and pick the right one. I've done two now, a Summit Gold D6 which turned out great and a Summit 650 which I still own.