How much should I tip??

I’m getting wedding photos done by a friend because his photography is AMAZING!!!!! Like truly the best photographer I have ever met

He charges $265 for his engagement photos but he’s trying to not get me to pay that much because I’m a friend and he is refusing to give me any other option

I am still going to pay the full price but how much do I tip??

I was planning on rounding it up to $300… is that enough???