Just changed all my tyres , one of the ones taken off had 3 puncher repairs 
is there a max on how many repairs you can have ? ( always concerns me as you don't know how long someone has driven on a flat tyre with poss damage to side wall etc !! 
the maximum repair a tyre can take legally is 3 punctures, no more, but tbh I would bin a tyre if it needed a second repair,
also the repairs have to be a specific measurement apart and not in the same third of the tyre ( I think that is accurate to the best of my memory as I used to run a kwik fit garage )
repairing a tyre with a plug as they do is supposed to be as strong as the original seal but it always makes me uncomfortable and it would always be at the back of my mind that that particular corner of the car had a possible weak spot and a possible increase in blowout percentage, that's just my opinion though.
for that reason I would just buy a new tyre tbh unless they where like £300 a piece, golf tyres generally cost up to £140 ish each so I would change the tyre depending on tread left as I wouldn't want to have to buy a pair of them to match wear on the other side.
but yes 3 repairs max buddy
