So I stumbled across this the other day, figured I would share it and see if anyone was interested:
Old Grade AA Earth Block - Now Retired/Converted
Basically, the Grade AA Earth Block works in the exact same way as the new Urth Block, all texts, all functions, everything are the same. Except, for as you can see, it still shows as 'Grade AA Earth Block' in the description field shown in the photo above.
The only reason I say this could now be one of the most rarest items is, I have never seen anyone post this for sale. It's been like 6-12 months since the change has occurred, and I would imagine that by now, the majority of the Glitch community has sold or used these retired kind.
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I am currently accepting bids for one (1) block. (not all ten like the pictures shows), just 1 of these retired Grade AA Earth Blocks.
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Bidding starts at 100k.