1. A computer-implemented method comprising: assigning, via a computer, a first set of separate vendors to a first unified ID for a first event, the first set of separate vendors offering tickets for the first event, the separate vendors each having a unique ID, the first unified ID representing a set of unique IDs of the separate vendors; presenting for selection, via the computer, a representation corresponding to the first unified ID; in response to the representation of the first unified ID being selected, presenting an offer, via the computer, to select a ticket from a set of tickets for the first event offered by the set of vendors; providing a tree of normalized event categories; parsing a plurality of vendors to map categories of the vendors to the tree of normalized event categories; and providing navigation using the tree of normalized event categories, wherein the representation corresponding to the first unified ID is associated with one of the normalized event categories.