£65 million is too much. His stats this season are more than impressive he has scored 39 goals in 33 matches for Sporting. He would definitely be a great addition to Arsenal and could help a lot, but the question is whether he would have a similar season as he did at Sporting. Either way, i still think £65 million is a lot.
He'd probably have a lesser impact than he had for Sporting, but there's also no doubt he's a quality striker who will score lots of goals... If he was an English player, his price tag would've been more than €100M for sure or just compare him with what Man United is going to pay for Matheus Cunha, £62.5M or roughly €75M
[I do know they weren't playing in the same league, but for a Brazilian, he's not that impressive].
Note: imamusma made a mistake of using the Pound sign in place of the Euro sign.