If we had to pick a left back, certainly from the Premier League, Baines would be very high or quite possibly top of the list. He's not young but I think he's the sort of player who can have a good career well into his thirties.
Now the question is what's going on with the players we've got. Buttner is a non factor, he's unlikely to ever be good enough and he'll never get the playing time here needed for him to improve. I have high hopes for Fabio, but the jury's still out on this one. Maybe we're looking for him to share more time with Rafael on the right, with Jones and Smalling focusing on central positions.
Which brings us to Evra. Like with Heinze and Evra a white back, you can't have Evra and Baines together for more than one year. There's not enough games around for both and someone will be frustrated. But maybe we're looking to get that one final year from Evra. Or maybe he is looking to depart. And if he is, then Baines is a good replacement, though I hope it doesn't become too expensive.