The Lakers whole starting lineup with the exception of Kobe isn't very valuable to trade with other teams.
C- Bynum: Fantastic when healthy, but really, that's a lot of the time only half a season and 3/4 of the playoffs.
PF- Gasol: Still very skilled, but is already in his thirties and has a lot of time and money on his contract. Hard for him to shed the "soft" label also.
SF- Artest: Not as good as a defender as he used to be. Not even close as good on offence as he used to be. Basically useless on offence by chucking threes with an occasional drive. Also in his thirties.
PG- Fisher: Not usefull at all on the offensive end besides a few clutch shots here and there. Probably wouldn't start on any other team. Really getting up there in age aswell.
Odom- Same thing as Gasol. However, his contract will expire soon. Somewhat valuable.
Really, the only valuable players they have as trade bait are Shannon Brown and arguably Bynum.