Very nice one. Pretty much every decent keyword is taken with either 'design' or 'blog', and most initials and even a lot of terrible keywords. Blog is a stellar keyword, as is Design, and they make perfect sense together, especially with the huge number of blog-templates and utilities that are being offered by e-companies large and small.
I think this is a name that should go straight to end users rather than resellers, just great, clear and obvious immediate uses for it.
Wouldn't let it go for less than 10K, and that much only if I was in a hurry. Personally, whether others agree or not, I'd be extremely optimistic about this name and think it would go much higher than that amount, even by multiples.
Nice one, good luck with it