| http://www.w3.org/ns/prov#value | - nds, depending on their condition and plate number, so they really are fascinating,??? Mr Harvey said.Mr Barr-Thomson, who owns ???several thousand??? stamps, said he planned to hang on to his collection for the foreseeable future.???Because they hold and increase their value, stamps really are a good investment,??? he added. ???But they also commemorate important events and convey a lot of inform
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