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> buy our product for only $29.99, blah blah blah It's $139: https://www.earthing.com/products/ground-therapy-single-sleep-mat-kit https://www.earthing.com/products/ground-therapy-single-slee... Note the "Verified Purchasers" and the rating which is slightly below 5 stars: high, but not maximum to avoid suspicion of fake reviews.