Yeah, that's what I normally do but I invariably end up with more components than I know what to do with.
I try my best to keep tabs on what's ordered to build what, but by the time Tayda ship comes in I've changed my plans so many times that there some components are orphaned even before they reach me.
I'll be sure to throw some money in the direction of the sellers you mention, though...
Like my grandma used to say...a fool and his money are easily parted.