domain Domain price and development potential

[serialCoder]

I've been wondering what could be the possibilities for these domains if i sell them as just domains or do they have a good potential if developed.
please let me know your opinions. thanks

transactionmonster.com
selling24x7.com
shirtportal.com
car-classifieds.us
macaubusinessclub.com ( probably does not have any value to a reseller at all)

 

[serialCoder]

any ideas please?