If the price is right, buy it... If you like to shop around more, you can try this LINK.

You can look at build dot com for a wide selection of knobs and pulls

Be sure to order samples so you can see the color and get the feel in person. (Check the return policy.) I ended up ordering and returning several, and looking at several places in person because I also needed appliance pulls and most of the ones I found felt too skimpy. I eventually went with Emtek Select, which I'm very happy with, but they were a bit more than what you have found. (~$26 for an 8", $34 for a 12" for regular pulls; appliance pulls are much more.) I think you're on the right track with Top Knobs or build dot com, just get samples first.