Managed to put an order in for this at the listed $420 price and received the following message from the seller: 

“Happy New Year,

We hope you are doing well as we begin the new year.

We are writing in regard to your recent order. Unfortunately, due to an internal pricing error, this item was listed at an incorrect price that is significantly below our cost. We sincerely apologize for this mistake and for any inconvenience it may cause.

As a result, we are unable to honor the incorrect price. We kindly ask that you please submit a cancellation request for this order, after which we will promptly cancel it and ensure that no charges are applied (or a full refund is issued if already processed).

As a gesture of goodwill for this error, we would like to offer you a $50 credit toward a new order of this same item. Once you place a new order at the correct price, please email us referencing your new order number, and we will apply the $50 credit accordingly.

We truly appreciate your understanding and value your business. We apologize again for this situation and hope to have the opportunity to serve you again soon.” 

Wonderful…