The red one looks like a 1000/1100
With the CI grates, I'd say that yours is an 1100. My redhead was an 1100 for $30 that came with a full tank of gas.
I wanted a side burner and found a 3000 for $25. Swapped lids and added griddles, and it's now my readhead flattop. The old one was then donated to the team down south.
http://webergrillreview.com/genesis1000.htmlWasn't looking, but then found an '05 Silver B for $20 - couldn't pass that up. Weber replaced the cook box, so it was like a new grill.
Currently trying to restore a Summit Silver I picked up ($30) because I want the N/S burners. It will replace the Silver B.
In the past two years, in this area anyway, the deals don't seem to be as plentiful. These same Genesis grills now typically go for $100-200 it seems.
But with patience, I think deals can still be had, and the older Genesi' are great grills.
We were at Lowes this weekend, and of course I have to look at the grills. Admiring the new Summit, and knowing how much I like to cook outside, my wife says "why don't you get that one?".
At $2500+/- I think I'll wait a while