There are still blocks for sale in the US and probably always will be. Not saying your wrong just that the reality is more of a gray market vs the official ARIN party line. There are blocks that were assigned predating ARIN and if you never agreed then you can still sell these at a market rate.
Yep, I looked into that but you basically cede all control back to ARIN. ARIN does not let you consider them “assets” so they get involved in any company acquisition. IPv4 space from other regions is much more flexible.
Its a bit of a compromise from ARIN, because in order to sell it and be recognized by ARIN (able to update whois, get RKPI records, etc) the sellers must give ARIN authority over the sold netblock space.
I personally own a /24 block predating ARIN, registered back in 1993. I am not planning on selling it, and never signed their RSA agreements and probably never will as long as reverse DNS remains delegated.
