What would total cost of the LEGO® Star Wars collection be in MSRP to date? [Dec 2015]
According to data collected from Brickset, the total MSRP of all Star Wars sets to date is $18,933.76 USD. This includes a total of 508 sets. I simply used the CSV export feature on Brickset to put this together.

Here's the raw data if you'd like to explore it further:

https://gist.github.com/jncraton/68beb88e6027d9321373