I think it mostly depends on why you had c-sections the first two times. My c-section was because my daughter was breech and I was fully dilated by the time I was on the operating table. So they knew my body could dilate on it's own and thought I was "the perfect candidate". I had a VBAC with my son. Early on during the pregnancy, I had to search for a midwife practice (they're more open to VBACs) in order to have the chance to do it though.
"Beanie" Natural 7w MC 11/21/12
"Nole" stopped growing at 7w3d D&E 2/11/13
Diagnosed with MTHFR and Factor V Leiden on 4/3/13
Like PP said it depends a lot on why you had them the first time. The biggest issue is finding a provider to do it, but again your chances go up or down based on your reason.
Re: VBAC after 2 c-sections
"Beanie" Natural 7w MC 11/21/12
"Nole" stopped growing at 7w3d D&E 2/11/13
Diagnosed with MTHFR and Factor V Leiden on 4/3/13
Due with RAINBOW GIRL 2/10/15
https://whatifsandfears.blogspot.com/2014/04/mana-study-part-4-vaginal-birth-after.html?m=1
https://pitterpatterbiscuitfeet.com/2013/12/05/the-story-of-my-births-theres-your-warning/