Daxx's Wife here. I like Barbra. I like her music a lot. However, YIKES! Those ticket prices are quite high!
I think that I'd invest the $$ in an I-Pod, download the whole Babs music collection, take the remaining cash and book a vacation. I'd enjoy the music while I was on that vacation!
But, that is me. I just can't see spending that kind of $$ on a concert. However, you're not me, so if you really want to do this, do it!