How to Decorate for Cheap
In addition to Craigslist and Ikea, of course, for that Corbusier-rip off, Stockholm aesthetic.
But for the walls:
Winkflash Posters using Giclee Printing Process (anywhere else it's at least 3x the price!)
Aaron Brothers' Buy One Get One for $0.01 Sale
Permission to Use Copyrighted Art of A Photographer Friend
Decorated Walls for under $100.
And that's my estimate for three 16"x20" prints and four 5"x7" prints (clustered, artfully) including the frames.