.mobi HEADQUARTER.MOBI & More, need advice

[nuke007]

Hi - I have stopped buying .mobi domains for long time. Some of the domains which i have been carrying for 3-4 years are about to come for renewal. Need you advice are these domains worth or should I sell or offer free to others for use.
CAREERNETWORKING.MOBI

HEADQUARTER.MOBI

HILARITY.MOBI

MOBILEAREANETWORK.MOBI

MOSTRECENT.MOBI

WIRELESSGATEWAY.MOBI

Thanks