Location may be considered important enough to bear repeating three times, but money's so important the O'Jays said it 30x in a row and people just started to dance. Ensuring you get the best of both when it comes to tickets, Seat Karma.
Aiming to create "the ultimate live search engine", Karma's a freakishly simple sports/concerts/theater aftermarket ticket tool that plops avail seats onto an interactive venue map, making it a snap to get the right price on seats so close you can actually smell Christina Aguilera's skank. Plug an artist/venue/city, and SK'll peruse 200+ brokers (StubHub, TicketsNow, SeaTix...) and return the pertinent tickets; select your desired event, and a seating map'll flood w/ green dots representing for-sale tix, which reveal details on pricing and number available when rolled over, pathetic stool pigeons unable to stand the harsh interrogation of your bad cop mouse. You can further refine your search via slider scales controlling the max you're willing to pay and how many tickets you need, extremely helpful when doing cost-benefit analysis of lifelong friendship vs $50.
True to their name, Karma's pledged to donate 10% of their pre-tax profit to cancer research and other charities every month, a move they promise'll have no affect on ticket prices -- good thing, since you'd sell your precious body for the love of money money money money.