I bought a single blaster box of Topps Opening Day, and 5 lose packs, which is more than enough. I'm not going to post any base cards because you already know what they look like. In case you don't, they look just like Topps base cards except the silver swoosh and player's name are just gray instead of silver foil and the logo is white instead of silver foil. And there is the Opening Day logo added. The Opening Day base set includes the Rookies and All-Star Rookie Cup subsets, as well as the new Future Stars subset.
The box cost $9.99 and had 8 packs (advertised as a 7-pack box with one extra pack). Wow, and extra pack! Not a bad price. Although I generally like insert cards, Topps has increased the number of insert cards this year and they sure put a lot of them in a box. I pulled a total of 22 insert cards from the 15 packs. If you were a set collector (which I'm not) this would be maddening.
Baseballcardpedia says the packs have 7 cards including one insert. I did way better than that, pulling 22 inserts from 15 packs.
There are relics and autos in the set but the odds are low of every seeing on if you buy only one box.
Topps Opening Day Blue
Topps Opening Day Breaking Out
Topps Opening Day Mascots
Topps Opening Day Fired Up
Topps Opening Day Stars
Topps Opening Day Superstar Celebrations