Before you click on the link, it's a GPS board, infact it's a PCI Express BUT!!! - turns out these are very easy accessible!
So there we have it, for about 10 bucks including postage, we have GPS!
I believe it is being sold sans antenna.
I bought a PCI5-S GPS module and antenna on Ebay for less then 15$. Tried it out last week and it works 
I soldered some wires to the PCIe card and connected it to an ATmega328 running at 3V3/8MHz. Uploaded one of the examples of the tinygps library and after 10 minutes it gave the right position. My 15$ GPS module - Bajdi electronics