Yes. See below.
nudu,
Once in a while you can get a really good deal on domain registrations
when a Registrar sells domains below cost usually during some kind of promotion.
But you should know that every .COM domain registration costs the
Registrar $7.06.
$6.86 goes to Verisign (Registry).
20 cents goes to ICANN.
Then add on the markup charged by the Registrar.
So to get a domain (.COM) for less than $6 is truly exceptional as
each sale would be a money loser.
There are several Registrars that offer .COM domains for $6.99 so
they lose a few cents and I suppose hope to make it up when renewal
time comes.
That said, yes you can get .com domains for less than $6.
You can get 5 domains (.com, .net and .org) for $5.95 each from Netfirms.
Renewals are $9.95.
Netfirms has been offering this for years.
Go here:
http://sn.im/Under6Dollars