Shaw was also £30M:
"Manchester United have signed Southampton left-back Luke Shaw for a fee in excess of £30million.
The 18-year-old has signed a four-year contract, with an option for a further 12 months, at Old Trafford having secured the move after returning from World Cup duty with England.
United had an initial bid of £27m for Shaw turned down at the end of last season but an improved offer sealed the deal."
http://www.skysports.com/football/n...ted-buy-luke-shaw-from-southampton-for-16330m
Rodriguez is in the same tier as Alaba and is also comfortably better than Shaw. One international match doesn't change that, but beyond those two there's Gaya, Bernat, & Kurzawa. Shaw is in the tier of Telles, Mendy, Guerriero, Wendell and Amavi. Most of these guys are a year or three older than Shaw but they also showed more going forward at the same age. All in all, there isn't a lot justifying 30m pounds let alone supporting any notion that he's sure to become world class.
Good player though.