http://attackofthefanboy.com/news/last-us-sold-7-million-copies-date/
TLOU has shipped 7 million copies, and I severely doubt 2.5 million copies are on shelves.
TLOU:R should sell another 2M on the PS4, and maybe even 3. I honestly believe when it's all said and done the PS3+PS4 sales will be at 10 million combined lifetime.