That's a Weber Q portable gas grill (looks like one of the Q100/Q1200 series). These are popular because they're compact, durable, and great for camping, RVs, tailgating, or patios.comes with propane
From what I can see:
The exterior looks good overall.
It has the side handles/shelves attached.
I don't see any major cracks or damage.
It just looks like it needs a cleaning.
Typical resale prices are:
Working, clean: $125–$175
Very clean with propane hose/regulator included: $175–$225
If it needs work or you can't test it: $50–$100
I'd recommend listing it for $175 and expecting to get around $140–$160 if it's in good working order.