Stubhub always has a good variety of seats, the service charges are quite high (you don't see the s/c until you hit the checkout page) they can be anywhere from $50 to almost $90 per ticket depending on the Artist/Show/Demand.. then you have HST and if it's a hard ticket. shipping. A $300 ticket as listed can often become a $450 ticket once you add everything in. Stubhub is an eBay company.
If you want to find seats and compare prices & s/c's from all the ticket resellers - seatgeek.com
(stubhub, ticketsnow, vividseats, razorgator, and several others post on seatgeek)