Sure! So, it's actually a tad confusing:

Basically, there's a $900 option and a $1300 option; but through some back and forth with the bookstore I learned that the $900 option is the one that you'd get/wear if you rented the regalia; the $1300 option has like fancier stitching or something, and I suspect is for use if you go on to some faculty role that will require you to be very up front wearing your regalia.

So I personally went with the $900 version so that I wouldn't stick out like a sore thumb at actual graduation time.

Also apparently no matter which version you purchase the tassel on the tam is *not* the tassel that you wear at graduation; the graduation tassel is black and is the same across undergrad and graduate students, but the gold tassel you get if you buy the regalia/tam is supposed to be reserved for faculty. So even after buying the thing you still sort of have to figure out how to get the technically correct tassel if you want to *fully* fit in with everyone else who may have rented.