Excellent score.
Mine are not that old (5 years for the oldest) but I don't see any sign of wear. Mine are left outside all year; either used for growing or in the summer storing/solarizing the potting mix.
Some scratches on the inside but that is where I shoved the cage legs so definitely self induced.
I have other knock off troughs (more in the line of long EarthBox Juniors) and the edges are rubbing off.
I thought the originals growing Papaya trees in Florida were still around and about 25 years old.
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