You can buy as much or as little as you want and keep the cards in your COMC account until you're ready to ship, at which point you pay $3 total no matter how many cards you ship. All the cards will be shipped together. On some occasions you might get 2 packages, but typically they will arrive in one package. Have fun shopping there, it's one of my favorite sites for buying cards.
Collecting John Stockton, Karl Malone, Ivan Rodriguez, Gary Carter & UF player rookie year cards. Plus Jedd Gyorko rookie and prospect cards.
Jedd Gyorko 2010-2013: Have 329/419 including 1/1s
Wantlist: http://sites.google.com/site/sportscardsite/set-needs/
Jedd Gyorko 2010-2013: Have 329/419 including 1/1s
Wantlist: http://sites.google.com/site/sportscardsite/set-needs/