Congrats mech21 on getting your domains accepted at Bido. Considering that they only auction one domain per day, getting four domains accepted is quite a coup!
Can you let us know what the domains are?
Bido is very trustworthy. They are one of the leading auction companies in the domain industry and backed by some of the largest domainers. If they did anything dishonest, it would be headline news across the industry, and they'd pretty much lose everything - it would be a stupid move on their part.
Many people are upset with Bido about not accepting their domains for auction. I think a lot of that comes down to the fact that Bido only auctions one domain per day, so they can really only accept an extremely limited number of domains. So, a lot of people with good domains at good prices get turned down, which is disappointing.
I've never been a seller on Bido, but I've been a buyer and everything was handled very promptly and professionally. Customer service was excellent and it was far better than dealing with Sedo or Afternic.