Nursery theme!!

Jessica • 29 years old, in love, and married. Mommy to Lucy born in March 2016. I am complete.
It seems like there are lots of moms who have already found out the gender of the baby. Has anyone started their nursery? If so, what's your theme? 
I keep browsing nursery furniture sets and they're uber expensive. Anyone know where they have reasonably priced nursery furniture?