RAM is most common in the desktop and laptop forms, laptop is the most uniform while desktop can vary in their height. RAM used in other systems can have a variety of shapes (typically still rectangular overall).
As long as the RAM you have has all the IC chips it came with and the fingers, you're going to get paid for either Gold Fingered or Silver Fingered.
If it has an aluminum (check for copper too) heatsink you can pull that off, just be careful sometimes the chips will pull off too, apply a little heat and it usually helps keep the chips from pulling off.
If you do end up with RAM with chips missing it's going to depend on how many chips were there to begin with whether you need to keep them separate. Some sticks have chips on both sides, in that case you could probably lose 1/2 of the chips (possibly more if it's well populated) and be okay, but some sticks only have a couple chips, in which case I'd definitely set that aside if one comes off. Then I would bag/box those separate from your regular RAM and from your truely blank RAM, add the weight to your quote as blank and then note that there's material separated in your email to Chris and clearly mark the material when you ship it. (Unless you're going in person then just show whoever is helping you)
Here's some examples of a variety of Gold RAM:
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