Looking through the big 5000 count box I bought at the last card show, I found a bunch of Promo, Pre-Production and Sample cards. Every one of these cards says Pre-production or sample or similar, if not on the front, then on the back.
Some even have 'serial numbering' like this
So if you are interested in the whole lot, let me know, but if you only want a few, I'd love to use that as the start of a larger trade. Let me know!!!!!!