dr. uconn, allow me to piggy-back on the good advice of KnightBridgeAZ and awhom111.
Most, if not all of the original tickets available to the general public were only available through the NCAA via Ticketmaster. Members of the general public could either purchase "all sessions" tickets (i.e., all six games over four days) or tickets for individual sessions. As you can imagine, many people ("investors"?) bought either "all sessions" or individual session tickets well in advance with the hope that they would get lucky with their team being assigned to their regional, or with the notion that they would be able to sell them on the resale market via Ticketmaster. If you were to go to either the Seattle or Greenville Region ticket sites (located through the NCAA website) BEFORE Selection Sunday, you would have seen a lot of unsold tickets (mostly upper level) and a lot of resale tickets (especially for lower levels at exorbitant prices!). Once the selections were announced, fans of the higher seed clubs went online through Ticketmaster to purchase tickets, some purchasing the cheaper unsold upper deck tickets, and others paying top dollar for lower level and/or court side.
Well, now that Stanford, Duke and Texas (all top 4 seeded teams hosting the first two rounds) have lost, there should some of their fans who are looking to sell the tickets they previously purchased. The easiest way for them to do so is via the Ticketmaster app. A Ticketmaster account is free and easy to use on one's phone.
I would also suggest going on the fan blog sites (i.e., the Boneyard equivalent) or Facebook pages of those three teams and ask if anyone is interested in selling their tickets. Having multiple ways of identifying legitimate ticket holders reduces the likelihood of scammers.
The other suggestion I have, if you have free time and are willing to take a chance (actually, its a strong probability), is to wait until after the Sweet Sixteen games are over, and then go online (via the Ticketmaster app or NCAA ticket site) to see if fans of the two losing teams are willing to sell you the ticket they purchased for the Elite Eight game. Of course, this plan assumes UConn will be one of the winners.
In any event, the closer you get to game time, the lower the prices will drop for resale tickets. True recent story: My best friend, who lives close to North Wilkesboro, North Carolina, drove about 1.5 hours to Greensboro to see his alma mater (Iowa State) play in an early round men's game. When he and his wife arrived, there were "scalpers" in front of the building with their iphones in hand, trying to sell their tickets. My buddy actually got two tickets in the lower level eight rows up center court for the original asking price, 45 minutes before tip-off. He and his wife FaceTimed me at halftime to show me where they were seated. A shame that his Cyclones lost!
Good luck, and let us know if you end up at the game! Fortune favors the bold!