When someone asks you if you mind doing something, and they respond with a yes, it means they mind doing it. This is a matter between you and Steve421--why would I want to get involved?
It sucks he blocked you, but maybe you can get some help from a Listia support member. I'll help you in any way I can when it comes to my own auctions but I can't get involved with other people's business. I'm sure he has his own reasons for doing what he did--it's also possible he just made a mistake. The Listia agents will be able to shed some light on the situation for you.