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Not on all, but most.
ComEd Marketplace is selling Nest E for $ 84.50 [comedmarketplace.com] (1/2 instant rebate).
Nicor is offering a $ 50 mail-in rebate [nicorgasrebates.com].
ComEd is offering $ 40 Rush Hour Reward [nest.com] (applies each summer, has been offered for past several years).