The $86.32 price for the P-37D with 2-5 month Prime delivery is no longer up on Amazon. I saw a parallel listing for the P-25F for $55.99 and decided to order one of those as a backup. That listing is also gone as of today. But my order is in, and I’ll report back on what happens. The vendor on both was Yamaha; maybe they’re experimenting with those prices. Or maybe Yamaha is planning to introduce some new models, which would be exciting.