Thing is he's on huge money at Liverpool reported to be around £150k a week so if you do sell him you'll be taking a low fee as the clubs who would in theory buy him won't be able to pay transfer fee and wages especially for a player with his injury record.
They're probably better off keeping him if they can but just building a squad where they don't rely on him, he's kind of like a bonus player when he is fit.
I feel a bit sorry for him as he's so talented and taking the liverpool stuff out of it he'd finally found a club where he could show off his talent.