Good SEO tool for $39? :-D

I think Serpstat is quite good. It can be more precise in some areas (e.g. Backlinks or Search Volume; and I think Visibility parameter is... Weird?), but in general, it's useful SEO tool. Go for it, especially if it covers your Googles' (aka databases)!

I'd like to have more KW in Rank Tracker (100, really? :-P) or to be able to *BUY* additional database for some $$ when it comes out, but we shall see what the creators think about that ;-).