Hi marcepoker and sorry for my delayed answer.
I recently had no internet for two weeks and therefore wasn't able to hold up the normal service level in the forums.
The question can just be answered on a personal basis. Every player should find his own answers to it. Therefore:
Personally, I give myself an edge even with 10BB if it is a low to midstakes tournament.
I wouldn't buyin that late if it is a 109$ MTT or above, because the players are a lot better and therefore, my edge is a lot smaller.
Doing the same in 11$ tournaments isn't a big problem for me since they are at the bottom of my buyin range and I don't care much for the buyin itself. It's a bit of a gamble, that I am willing to take, because I see the opportunities in late game in these tournaments.
As you can see I consider future EV as well as my edge at the very moment.
If you have any further questions feel free to ask!
Regards,
Asaban