In my experience these are not scams or typos. I have purchased rods, reels and braid all at deep discounts that sometimes only last a few minutes. I have found this on both Amazon and Cabela's.
I think on Amazon there is an automatic or nearly automatic price reduction on some items once their inventory drops below a certain point or they have not sold enough in a given time frame. As soon as they are sold at that price it reverts to MSRP or whatever it was before it was discounted.
Only issue I have had was the Penn Fathom I just bought came in the Penn box and was soaking wet and held together by packing tape. Reel is perfectly fine. From what I could see it was the USPS that did that not the seller.
I did not buy this reel simply because i have no need for a 50W. But you know I will jump on a similar deal on a 16 or 20 if it shows up.