Exo Terra Heat Mat - Reptile Terrarium Substrate Heater for Safe, Even Heating | Ideal for Tropical & Temperate Reptile Environments - 4 Watt, X Small X-Small is up for auction in Pet Supplies. The current bid is $2.00, 90% below the $20.00 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.