In fairness, the only 'talk' of 80m, is people getting carried away with rating him world class based on the last couple of months of the season. And the fact we are linked with nobody else. One of the best wingers in the league, sure.
The first half of the season, he had only two 90 minute appearances. He averaged 17 minutes a game. He only started playing full games after/because Brighton sold Trossard to Arsenal. Credit where due, he performed for Brighton, and is worthy of being noticed and mentioned. But is he fuck even a 50m player never mind more than that.