I really wouldn't sell Sturridge and I have a bad feeling about it. So he only plays 25 games max a season. He is fit for about 15 of them. He's also lost some speed, so he's not exactly the same. He'd probably score or assist in 3/4ths of his games if he was ever fit a full year for this manager. This is obviously never going to happen though.
Last season he scores in half his games. Scores against Man United in the Europa League, then against Villarreal and in the final against Sevilla. Did something nice leading to that last goal against Dortmund too. Always dangerous in the big matches and brings the extra something. Then today in a game where West Ham clearly wants to defend, he comes out there and runs like he's fully fit and they can't do anything about it. Liverpool desperately needs a player like this to handle defensive teams.
He obviously needs to be managed, but...it would be so stupid to sell him and watch him score 20 goals next season. I can just see him doing it now for Arsenal. His injuries this year were nowhere near as bad as in previous seasons, and none of them were to the ankle or hamstring. I don't think he'll ever play more than 30 games in a season but it would be such a waste to hand him to a competitor. He also won't be going to an international tournament this summer, so there will be less strain on his body and he should be ready for the start of next season. They should only sell a player like that if they're going to buy a world class player. No prospects, but the real deal.
I'm not sure he'd want to leave either. No English team in the CL is going to take the chance, and he wants and deserves to play there.
Also, Henderson has played just two more games the last two seasons. Most people would say getting rid of him would be stupid.