Yep, it's a 'flex. An early Automat. Looks like a real veteran - from the losing side of a war.
I had one similar to this, serial number a tad lower, given to me by a friend in the 1990s. The lens wasn't color-corrected, so likely a very early postwar model. It did well with B&W film but the two rolls of Ektachrome cI shot with it were washed out (= pale colors). In due time I donated the thing to a charity shop in Melbourne and it was sold for, as I remember, about A$125. Abut 20 years later I came across the slides and scanned them, they took a bit of post processing work but the images were okay. Sharp enough, good mid tones, but then every Rollei ever made could easily produce those.
I've also always wondered why bits of the black paint finish fall or peel off the WLFs. Inferior metal available in postwar Germany?? Mine had this same 'problem' and it had also been dropped at some time in its past life, those TLRs always seemed to land on their tops and ended up with dented WLF corners.
More valuable to me was the kit of accessories that came with it. Filters, hoods, close-up lenses, a tripod mounting plate (called "the Rollei mating device" in some early photo books, an odd name?!?), even a panorama device with click stops and a spirit level, super neat if not so useful. Also a very early (ca 1950) Rolleikin with the complete back and even a built-in cutter/knife to slice the film, which I never used and couldn't figure out why it was included in the back in the first place. I still have this kit - it gets used now and then on one of my Ts and my Rolleicord Vb and it works well for something that is 70+ years old.
To go back to your Rolleiflex, from the photo you posted, unless it's entirely functional mechanically, don't pay a lot for it...