I don't think it's bad value for an aging slugger (he's 38 in May), but here might be the case of being better served just keeping him.
I like Maybin, but he's potentially a new Mike Cameron, who by and large goes undrafted. Jones is solid all-around talent: most keepers aren't deep enough for him to truly excel.
Manny, on the other hand, will burn out rather than Vladdy's slow fade away.
I myself turned down giving up Jay Bruce for Manny today, but I was advised here to do it, for the record. You could aim higher if you wished.viewtopic.php?t=371093