Goldgrrl,
Since I just bought a property, I retendered my shares and sold about 25% of my portfolio. I called a local broker due to my preference to avoid shipping. They said they would only accept certs for companies with a marketcap over $300 million. This did not work for me so I ended up sending everything to Penntrade. The whole thing went smooth and within 3 days everything was posted to my account and ready for sale.