I purchased amazon sword plants in tubes from pet-smart months ago and they are still in my tank. You would remove from them from the container and clean off the gel the roots are encased in and treat like any other plant. I dip my new plants in a Hydrogen Peroxide bath.
No telling how long they've been on the shelves and I've seen some in terrible shape ... and others that looked in remarkable shape. Can't hurt to buy one and see how it does ... usually the ones in the tubes are advertised as snail free.
Petco usually has a dedicated plant tank and I've seen Java Ferns attached to rings and in little plastic cups.