I was able to get half price tickets for Donny and Marie!
It was last year and I was staying at the Flamingo and really wanted to see this show! I went too the box office and was told the cheapest tickets were $100 each for the balcony. So, I proceeded to walk next door to O'sheas (RIP) ticket outlet and found out that they had tickets. So, the next morning when they opened I was first in line and purchased 2 tickets for $100! I was in the balcony and it was a great seat (table next to the ledge). They said they usually had seats on the floor, but just did not for this show.
I do know ticket availability changes all the time. It can even change throughtout the day! I was at Circus Circus (No Jokes) and I walked by the ticket outlet and they had Donny and Marie, After going up to my room and thinking about it and talking to my friends we decided to go. When we went back to the booth they had just pulled the show? The ticket person said this happens all day.
Hope this helps
Dena