Yes, I agree. But as I find ads that say it is "powered 600 watts". The ads include photos of the back that clearly show it "is not" powered. And amongst the same search some that say "powered 600 watts" that only include the front photo in the same price range as non-powered ones. This is mostly on guitar centers used listings. The reason I frequently search guitar center is I have about $300 in gift cards I can use if I get it from there. I have e-mailed guitar centers about these listings but I never get a reply. I typically don't see this problem with reverb ads. Also, I typically get good communication back from reverb listings.
If you don’t want to miss the opportunity of it being what you want but don’t want to gamble that it isn’t, go to your local GC and order it from them. When it comes in go and either buy or not depending on what it really is.