thinking about buying these used tires. advice? (pics)

[Schwarz328iS]

i'm thinking of buying these tires that the sellers says he only used them for one summer. I've only seen them in pictures, and they look pretty good to me. Just wondering about how much life (in terms of 32nds or whatever) these look like they have left? or if it's hard to tell from just the pictures. just any advice would help.

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thanks