Seat Karma is a search engine that allows you to find people who are selling their tickets to sporting, theatrical and musical events. (StubHub is another website that offers a similar service.) One of the neat things about Seat Karma is you can virtually put yourself in the seat you want to purchase and view how the event will look from your seat’s vantage point.
Seat Karma has taken vantage point pictures from various positions around roughly 140 venues. If you are looking to purchase a ticket from one of these venues, you can see what your view will be like BEFORE you purchase the ticket.