Because official production has ceased, your options are limited to retailers with leftover stock or secondary markets:
: Some niche beauty sites like Clarisonic.online claim to have new stock of models like the Clarisonic Mia 2 Sonic Cleansing System Go to product viewer dialog for this item. for approximately $129 $79.90. Third-Party Marketplaces : Walmart : Various third-party sellers on Walmart offer models like the Clarisonic Mia Smart Go to product viewer dialog for this item. (~$180) and Go to product viewer dialog for this item. (~$90).
: A major hub for both "New In Box" (NIB) and used devices. Prices for a Clarisonic Mia 1 can start as low as $19 for used units.
: Often has used or gently used devices, such as the Go to product viewer dialog for this item. for around $35. Clarisonic: Brush Heads & Applicators - Amazon.com