It will be interesting to see. Some of us overrate Altherr and some of us underrate him. He's young but not that young, cheap but not that cheap. As a bench player he's probably a non-tender next year. So I kind of suspect 29 other teams either don't need him, don't want him or will prefer to get him for nothing - not because the trade price would be high but because he'll cost half as much and they don't have to immediately put him on the 40 if they don't want to.
I guess if a team does feel otherwise the Phillies can pay half his salary in exchange for that low-level guy. Certainly with the perfect combination of playing time, healthy and returning to form he is a useful piece. But I'm not sure that combination will occur. And his career OPS is about the same as Ben Francisco and John Mayberry Jr. at this point. Useful pieces but not valuable pieces once they reached a certain age/salary.