I am more than likely purchasing a horse who had the tie-back surgery done a few years ago. From my understanding he has not had any issues since. It was performed by a very reputable specialist vet here in our state. 

We are pending a vet check this week by the same clinic and I will be picking their brains on the issue but wanted to see if anyone else has had any experience with this? Any info you can share is appreciated!!!

I saw your post and wanted to share my two cents worth. I purchased an ex racehorse and had the tie back surgery done by a reputable and knowledgeable vet. Surgery was a success but this particular horse always had trouble with breathing nasal discharge, coughing, decreased performance etc. If to do it all over again I would NOT but times seem to be changing where I see folk accepting lamesness/medical issues at the "norm". 

Good luck!