Rafael
Zabaleta
Ivanovic
even Glen Johnson and Seamus Coleman, probably Debuchy when he gets settled
thats just in England alone
You'd actually buy any of them over Kyle Walker? Crazy. I'd rather keep Lowton than have Rafael (attitude), Zabaleta (too old), Ivanovic (CB not RB).
The others are also rans. Walker is fast, he practices against Bale, and can score and create chances. His defence game is good and improving.
Walker is the only defender I'd take from the current Spurs team. (Yes, Vertonghen is better than Clark/Baker but I expect Clark/Baker to improve to his level within a season or two).
Zabaleta is 28 and been one of the best defenders in the league the last few seasons.