We don't really have forwards to spare. We have role players like Sim, Chartrand, Lappy, etc. but I expect Belanger to be healthy and play around 75 games for 23g-27a thats why i wouldn't want to trade him.
the price that you would be willing to pay for belanger is not close to what he is worth to us. he is a very good third line center who can put up 15 to 20 goals (over 82 games) from the third line even if he's the only offensive talent on that line. he's good on faceoffs, and plays with some bite. furthermore, he's young and cheap, and a product of the kings system and andy murray's tutelage from day one, and i daresay a fan favorite. i feel that he is an absolutely pivotal player to this lineup.
however, he doesn't have a lot of trade value because (1) he's injury prone and misses about 20 games per year. (2) his numbers aren't stellar; his worth must be measured well beyond 15 to 20 goals. (3) i am one of the few who thinks that he still has untapped upside that will show itself this year.