Ask a buddy with a STH discount to hook you up. The stores outside of the CLINK actually honor the STH holder discount as well. So that way you can get a limited for $115. And at least you're paying just a tad more than gameday price for something with stitched lettering/numbering vs $70 for a pile of junk on eBay like the others have said, you can spot those counterfeits from a mile away, the coloring/contrast of the feathering on the numbers are always off, and the size of the numbers are also usually really small. If you get a counterfeit Elite, the material is also very off because the ventilation is way too large. Either way it looks bad, just avoid those like the plague.
I think because our jerseys are very new and somewhat more intricate in the coloring scheme, the knock offs are noticeably bad at this time. Where as something like a Niners jersey that is just straight up red and white. Much easier to fake.