Looks like a decent deal, but I'd pass on the pre-cut to seven inches thing.
In the below pic, I have the end piece of the tape measure in the groove between the headtube and forks. So while this may not be precisely accurate, it would only be off by a few centimeters at most:
So, if you know for an absolute fact that you want the stem sitting all the way down, it looks like it would work.
Depending on your time frame, I say wait. One thing I learned when I was building my bike was to never say "Okay, I'm going to buy the forks/handlebars/wheels next".. instead just watch for sales and the best deals on everything and buy what's most discounted. In other words.. if there's no rush on the fork, I think you can find a better deal. Especially considering the lack of cock pit adjustment options that pre-cut steerer will give you.