This is an email only
I signed up for email notification from Bowflex a few months ago and just got notified by them this evening that SelectTech 552 adjustable dumbbells are available for order through exclusive email offer in limited quantity. May take up to three months to ship. Shipping is free. So, if you have signed up for notification, check your junk folder for link to purchase.
Fine print from the email:
Limit 2 per customer per transaction. While supplies last. This limited-quantity, limited-time, one-use offer, expires 9.3.20 at 11:59 PM PT.
Not sure if they will just send the next batch of email notifications or make the dumbbells available on their website if they do not sell everything.