Some names to throw into the hat:
Felipe - LB from Depor. Had a great season till his leg was broken into itty bitty pieces. No idea what he'd cost. 8M?
Capdevila - I think he's available on a free in the summer. If so, he'd be a decent short-term solution, particularly if funds are tight.
Azpilicueta - Carra or Masher filling at RB next season is unacceptable. If Kelly is deemed good enough to play when fit, great. If not, this guy is 20 years old and has a bright future ahead of him. City were linked briefly I believe, so if there is any kind of bidding war, there is no point. If we can get him for a reasonable price and it reflects the fact that he'll be a backup RB, we'd be winning.
Elia - 9M? Fast, direct and perhaps worth a punt.
Mata / Silva / Turan - 20M? I don't know Turan that well, but everyone else seems to rate him. We need a top quality player to start on the left though and perhaps Mata would be another versatile option.
VDV - Some have been brave enough to suggest he's been better than Kaka this season. I don't know, but I'd still take him. Good player.
Henry - he's almost certainly going to leave Barca in the summer, so could be a good signing for us although dependant on a number of 'ifs'. 1) He's still willing to work hard, 2) He'll take wages that reflect the Henry of now and not the Henry of 5 years ago and 3) Barca release him for a symbolic amount.
The striker part of our summer is going to be the most difficult though. If Benzema is available, he'll go to Utd and although Higuain would be fantastic, it seems extremely unlikely. Ditto Villa who would be mad to leave Valencia (decent club who win nothing) to come to Liverpool (better club but still win nothing) at his age. I was hoping to come up with a few names after that, but I have no idea. Jovovic might be better than we expect, who knows.