Seems that these are returned UL tickets and or unsold (officially) season tickets...as the lower rows Sec 223 are $72 while a few uppers are $22. Over 100 plus unsold tickets in 223.
Sec 224 has 88 tickets available...most around $29 - $33.
2nd level South End Zone still has a good number of tickets, most resale (at all price levels)
232: 81 tix
233: 100 plus
235: 100 pus
236: 100 plus
201: 100 plus (starting at $26)
202: 100 plus (starting at $25)
203: 69 tickets
204: 80 tickets (starting at $25)