11x17 by Bloc Party typically asks about $25 on Music Merch Marketplace (M³), based on live listings from eBay, Discogs, and official stores. That is 17% below the typical poster on M³ at $30. Condition, size, and signatures can move a single copy's value.

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Music Merch Marketplace (M³) doesn't have enough live listings over time yet to say whether 11x17 is going up or down in price.