WHY so paranoid about an 07? it's the same bike, they might have changed colours but there are no improvements made between those years.
The red has a nice new(er) chain but the picture doesn't tell much else about its condition.
Stay away from the 22k... you already mentioned you don't know much about bike mechanics.
Unless you only weigh 170lbs, you wanna service the suspension, do a valve adjustment (not difficult but very labour intensive), flush all the fluids, most likely need new brake pads, chain, sprockets.
The thing with bikes, you can't let anything go past a relative condition of 50%.
if brake pads get low they might let the brake pistons get wedged cuz they're fairly short and don't like being extended out due to low brake pads.
a worn sprocket will eat the chain (stiffen up links, making both sprocket and chain worse)
old brake fluid isn't effective anymore, will have collected moisture and causing brake fade or more a spongy lever.
old engine oil will wear on ALL engine components since the clutch uses the same oil.
squared off tires are no fun to ride with unless you live in the souther states that got no hills or twisties. 2008 Kawasaki Zx6r Ninja 600, Cincinnati / Bethel OH - 111070506 - Cycletrader.com
This is more something you need.
All i can see is a missing windscreen and a heavily dented tank but the frame slider saved most of it. if it got around 10k milage that would make for a great beginner bike!
The dent is easy to pull out and then just repaint the tank.
Bike comes with a nice Leo Vince exhaust and cleaned up tail. Tho it still has the original sprocket/chain. 2007 Kawasaki Ninja Zx-6r -6r, Sumter SC - 111590668 - Cycletrader.com
This is an absolute stock bike except for the cleaned up tail.
probably brake pads and oil change. 2007 Kawasaki Zx-6r -6r, Huron OH - 109589999 - Cycletrader.com
This bike has been down on the right but only upper fairing scraped and is missing mirrors.
Brake fluid still looks yellow (good)
Tires are good
chain/sprocket have been replaced.
fancy Gator seats
This one gets as close to ready to go as possible. 2007 Kawasaki Ninja Zx-6r -6r, Springfield OH - 111440822 - Cycletrader.com
Almost same features as the previous, very clean. 2007 Kawasaki Ninja Zx-6r -6r, Bensalem PA - 111546697 - Cycletrader.com
TwoBro pipe with cleaned up tail
under 6k miles, good price. 2007 Kawasaki Ninja Zx-6r -6r, Asheville NC - 111508060 - Cycletrader.com
I'm jealous at the rider! He lives on;y 1hr away from the Dragon Tail. This dude rides pretty hard.
Gripster Tank pads
Twobro Black edition pipe
Cleaned up tail
Puig tire hugger
Even tho it's been used heavily, i'd still buy it if i'd like the 08 look as much as you do.
have fun shopping.