Noticed this game on sale while browsing my Steam wish list.
I quite enjoyed the first game and these reviews are very positive.
According to ISAD, this is the historical low.
The Definitive edition is $16.99 so this may be better value if you're keen for the expansion.
Also, you can play the demo for free in the link if you want to try before you buy.
Also $4.95 at EB Games.
No stock near me, but maybe stock near other people.
https://www.ebgames.com.au/stores/find-stock/218488