I am starting to get into the larger format of 16 x 20 photos signed. What are you finding as the best way to protect them while trying to get them signed?
Buy a 16x20 Itoya binder. Hands down the best way to store photos, I have dozens of them. I use toploaders in some cases when traveling, but you want to avoid taking the photo in and out of the top loader too many times.
Seconded. Itoya makes good products, and many sellers have them at reasonable prices on Ebay. You can also check Bagsunlimited.com for good mylar/poly storage options.