Lyon probably want to sell Bastos btw, he's been running his mouth off too much, and talks too much in the press/media, talks about internal affairs in the club and what not. To be honest he hasn't been the success everyone was waiting for at Lyon, not very consistent, has bursts of brilliance, but has not really reached expectations consistently. I don't think it would be prudent to spend more than 15M on him, and even 15M is a big risk to be honest.
Still on his day, he's a deadly winger, so he might turn out to be a worthwhile gamble.