can anyone give me a genuine reason why he'd want to come here?
Since sanchez joined us, you have been worse than us every season and even finished behind us again this season. It took you winning the europa league to qualify for CL which is only something that has been ongoing for 2 years now as well. Under the old rules, you would have been in the same position as us with no CL.
Of course its worth pointing out that we only missed CL by a point so its not like we are massively behind the lot above us. Also, think liverpool will fall behind again next season, all their targets don't seem to be materialising already, still early days though.
From our point of view, selling abroad is only viable solution if we must and with psg giving up on him and bayern signing gnabry, I think sanchez will stay and depending on our summer business and how we play up until january, he may even re-sign or leave for free.
We are not in that bad of a position financially that we need to sell him now either and it would be difficult to replace 30 goals and 15 assists or whatever it was, even with 60 mill or so to spend. The market out there for attackers is not that great and considering where we finished, I'm sure the last thing wenger wants is to further weaken us.