Get Lemar in, keep hold of Özil, Sánchez and Giroud and we'll have some genuinely decent forward options in the upcoming season.
Could afford to lose two out of three of Ox, Walcott and Welbeck with that sort of business.
But let Sánchez go and there is really no chance of us finding players to fill the gap he will leave.
I don't think it's a fannish exaggeration to say that Sánchez staying is probably worth an immediate average £15m in revenue in the 2018-2019 season, given how likely he would be to make the difference between CL requalification and not.