He's 29, he's a bit of an injury prone player and he's got just 1 year left in his contract. Add 10m to that 40m and you'll end up with Koulibaly whose younger, stronger and better. Anything beyond the 30m mark for Toby would be crazy. Alternatively we can have a backroom deal with him and have him sign a pre-contract next January
United aren't the type who like signing 29 year olds especially considering the solid youth talent coming through (Lindelof, Tuanzebe and Bailly). If this deal comes through than its a big vote of no confidence to the experienced heads (Smalling, Rojo and Jones) who should have stepped up and lead the defence themselves. I can see at least 1 of them leave tbh.....probably 2.