Those are great cabs. I remember finding a 1969 100 logo G12H basketweave on Craigslist a few years back, in mint condition. It was $650 though, so I spent a bit more
That is a good find (But btw, mathematically, the thread title suggests you are 'much less than' happy!)
Seriously, those "Classic" cabs are fairly rare....as in, you don't hardly ever see one compared to others, like the Vintage or standard 1960 cabs.. Expecially a B cab. Yours looks to be in super nice shape, too. Have fun with it. I had the slant version and it sounded great!
Those B versions are super-rare where I am, I've had my eye out for one for years, I have the A cab, just need the B for the full setup.