Bitmain has significantly reduced prices for its Bitcoin mining machines, with several models from the S19 and S21 series now available at what are described as 'fire sale' prices. According to internal pricing disclosed by TheMinerMag, the S19e XP Hydro and 3U S19 XP Hydro are priced as low as $3 per TH/s, while the S19 XP+ Hydro is approximately $4 per TH/s. The S21 immersion cooling model is priced around $7 per TH/s, and the S21+ Hydro at about $8 per TH/s. Previously, Bitmain offered a bundled deal for the S19 XP+ Hydro at about $4 per TH/s and auctioned the S19k Pro starting at $5.5 per TH/s in November. In addition to price cuts, Bitmain is enhancing its 'miner plus hosting' sales strategy, offering hosting electricity rates between 5.5 to 7 cents per kWh, plus a 0.3 cent management fee. This service is available in regions including the United States, Kazakhstan, Brazil, Paraguay, and Ethiopia.