I like Guendouzi deeply, but I'd push him out the door for that money. He's a bit part player who isn't going to come of age for years, best case scenario, and a number of things can happen between now and then that alters his trajectory. Those £60 million could go a long way to get us a top player in a number of positions.
Looking at the article the £60 million is just the fee we're supposed to have quoted to PSG though. It has not actually been offered to us, directly or indirectly.