On Cap and Trade

I have a plan to reduce excess world population.  I will base it on the Cap and Trade model promoted by Al Gore to reduce green house gases.  To stabilize world population, I recommend that each family unit be alloted two children per family.  This should reduce the population growth to zero.  Their are a number of families that are either unable or unwilling to use there allotted population slots.  These people should be allowed to profit by non use of their population slots by auctioning them to the highest bidder..

I wonder what my slots would be worth on the open market?
(may it be noted with a tone of sarcasm and humor that I discovered after I was married that I was born unable to father children)