>  why are we not allowed to sell ip address? i dont understand...please explain...thank you   
 
Quote from ripe-152:
 
    "By themselves, these resources have no intrinsic value; their worth is only
    realised in conjunction with the provision of Internet access.  Thus, while
    registries may charge for their administrative and technical services, they
    may not charge for name space or address space as such; no unit cost or price
    tag can be attached to a domain name or to an IP address, public or private. "
 
See http://www.ripe.net/ripe/docs/ripe-152.html for the full document.
 
Regards.
 
Mike Norris