I see it on Amazon, but it is interesting to look it at a macro level. If you are a third party selling on amazon without offering prime shipping, you have to cut your price to equal or lower to the amazon price or else no one would ever buy from you. So it is more that prime is forcing third party prices down to compete than Amazon double charging prime users.

> This will be my last year of Prime.

The refunded me the pro-rated balance of my subscription when I cancelled a year or two ago.