I just bought a box of MM13 off of eBay last week for 375$ and opened it yesterday. The 3 mythics were the 3 cheapest dragons and I opened chalice, engineered explosives, and pact of negation. 1 path and 1 eternal witness for uncommons of value. Super shitty box. I bought it because of the best EV of older sets. But unfortunately randomness was certainly not in my favor this time.