No one can answer this for you. It really comes down to price and how much risk you're willing to take on. Ptex can last a long time in a repair or pull out after a run or 2. If the repair is done well i.e. smooth and was done on a dry baord it will likely last longer. Also from the pictures and probably in person you won't be able to tell if there was core exposure and damage prior to the repair.
Make sure the repairs are smooth, the price is something you're comfortable with and the understanding that you'll probably have to refill some of those patches down the road.
op board looks fine, it looks like it might have had a base grind after the ptex repair...ask about it....but it looks like its just been scratched up and the marks almost look like some black stuff got smeared on it....not really ptexed...thus reason for asking about the base grind. The board appears to have been ridden very little....because topsheet looks minty, no sidewall chips and bindings look clean. the last pic...also looks clean in that if it was a deep core shot to the edge would also be perhaps tweeked or bent or pulled out. One thing to try is to bend the shit out of it and listen and feel for any weakness or for squeeks/cracking...it that happens, its toast.
agreed, the repairs look way too clean and structured for it not to have had some sort of base grind. Actually, those are tiny scratches and really didn't even need to be p-texed (owner is anal)...even if they were core shots, they would have been welded (dripped p-tex cracks out in deep/wide gouges), so they are totally solid, if that's what you're worried about