Good Old Games (gog.com) are offering the Divinity Anthology as a "Pay what you want" package until the 18th October.

http://www.gog.com/divinity

You can pay whatever you want for the Divinity Anthology, but you have to pay at least $13.03 to get all 3 games in the series. You can pay whatever you want for the original Divine Divinity, but you will need to pay over $6.47 to also get the sequel Beyond Divinity, and you must pay at leasr $13.03 to get all 3 games including Divinity II.

Divinity II is also a very special Developer's Cut which includes both the original and expansion packs, but also has built in a load of extra features as it is the version the developers used when testing the game, so you can access any area, weapon, turn yourself into an creature in the game. you can basically play around with the game however you want.