That's $35 for two tickets, via the re-seller Venue Kings. Note that typically sellers on sites like Living Social and Groupon take home 50% to 60% of the fee.
As shown on the Venue Kings chart below, sections 211 and 221 are not bad, since they are not in the restricted-view side of the venue, where, curiously enough, many tickets are not available. (Are those for the Barclays Center to distribute as freebies?)
Surely some tickets on these resale sites come from season ticketholders, but I have to believe some are quietly put on sale by the venue itself.
On the Venue Kings website itself, tickets start at $9.96. Is that a better deal overall??
Actually, if you're buying from Venue Kings (and many other sites), there's a big service fee, so two tickets cost $37.29, which is more than the Living Social deal. On StubHub, tickets start at $9.25, with a smaller service fee, for a total of $26.65 for two.
The official channel
Tickets officially start at $20 (see inset in screenshot below) and $15 on the re-sale market, via Ticketmaster and the Barclays Center. (I didn't check the service fee.) Either way, that makes StubHub, for this event at least, a better deal.