It's not an LOTR collectible per se, but I picked up this nifty Dwarven themed geocoin on eBay.
The weight of it is very nice, as is what appears to be enamel work. Diameter = 2 inches
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Dwarven Geocoin
1"If more of us valued food and cheer and song above hoarded gold, it would be a merrier world."
~~ Thorin Oakenshield