HopeRock Ultra Quiet Rock Tumbler Kit, Rock Polisher with Noise Reduction Cover for Kids, Adults & Rock Collector, 3-Speed Motor & 9-Day Timer, Great STEM Science Kit Gift for Age 8+, Boys Girls Toys is up for auction in Toys & Games. The current bid is $3.00, 90% below the $29.99 MSRP, in As Is condition. This auction has ended — similar items appear in live auctions regularly.