We regularly get inquiries about the perl.org, perlmonks.org etc domains like the following:
We are interested in purchasing your domain name. If interested, please let me know what it takes to buy it.
If agreeable, we can finalize the deal through escrow.com Monday.
Our typical response:
One billion USD. Non-sequential twenty dollar bills preferred, but not required.
You pay the escrow.com fees.
p.s. no, it's not really for sale.