This is such a coincidence! I am also having surgery 2 weeks before the concert and I know for a fact I will not be standing up straight that quickly (last time I checked, I was not wolverine but fingers crossed!).
I have carefully planned to have a check up on that day and to have the surgery done in Boston (hopefully this is considered normal behavior)... it would just feel like such a waste not to even get a peek at the concert! I might go for 15 minutes or so (sucks... but yeah...).
Also, I will keep checking ticket master because one of their known strategies is to pretend something is sold out when it actually isn't. You know... like the air company does "Last seats for this price..." . It's a trap people!
I could PM you if it comes back, if you want me to!