I daresay plenty will be sold, one woman who'd completed her "run" was featured on BBC TV news yesterday already selling hers.
On another angle, why is Britain making such a mess of the torch run, it's pathetic? The "runners" are mostly walking, each one often only a few yards to the next handover, often clowning around, kissing bystanders etc and generally turning it into a mickey-taking circus. Other countries have always treated it seriously, participants genuinely running and doing reasonable distances before handover. I hate to think what other countries are thinking of this shambles, more akin to a student rag than a celebration of the Olympic ideal.