Call SU. (SU will tell you to call back after the season ticket holders window to buy tickets ends maybe Tuesday or so and see whats left then.) Or take chances with guys on the street. Both should save you something. If you stalk ticketmaster you might get lucky more will be released at some point.
Stubhub at the current prices isn't bad, its not exactly going to be the price of a movie and I know its a lot and with travel and stuff it'll add up but whoever is selling the cheapest tickets isn't making anything after fees if strips are on there under 250. If you buy a strip right now for 260ish after fees thats 130 a piece and the face is gonna be 100 so not a crazy premium. Its the sweet 16 and elite 8 and your team is in an NBA arena not and NFL one like 2 of the other regionals. One ticket gets you 2 games, the other gets you in to see a game with a final 4 trip on the line. Be happy its not Friday-Sunday if you want to go b/c the prices would be way higher if it were Thurs-Sat is harder for more people to get off work. (Friday-Sunday and no Easter and each sessions probably 400 to get in if Indiana and Syracuse are playing.)