I played Deadface CTF this weekend with Psi Beta Rho at UCLA.
I really enjoyed the crypto and steganography categories.
I presented my solution to the Price Check problem. A quick overview: I noticed that the data in the provided csv was just 0s or 255s, and I realized that was probably a qr code. The problem also mentioned that users might "scan" something. So I wrote a python script to generate a qr code from the image. The flag was revealed when you scan the qr code.