He paid me late twice, the next year he tried it again (only ever becoming unavailable around the time of renewal payment! funnily enough). I sent him three e-mails to explain he would have to pay a reactivation fee (which was extortionate on my part :p ).

*pop* and he was gone.

I loved the feeling I got when the new sucker he got to take over rang me about transferring the domain name and I told him what he had let himself in for!