My sister and I will be arriving to the city on Wednesday the 7th for 3 days and 4 shows. We already have Great Comet and DEH tickets, but she's never seen Hamilton (I have and am ok saving my money on a second time at these prices). I saw today, there were a couple of StubHub tickets under $300, but not till 2:59 (for 3:00 curtain). Is this common, and could she get inside and seated before curtain up? Also, are there any other options for her - we get in around noon so cancellation line is probably not an option. Also, is this StubHub option safe? Thanks in advance.