Thanks for posting. I had not seen that exact type before.
The price is in the range (edit: but now I see that yours is for TWO OZ rings ... so a really good price if they are as durable as regular Osbon) .. and you are right .. many places price gouge: 30 .. 40 .. 50 dollars each for regular Osbon rings. Crazy.
The best price I could find was $23 each for the regular Osbon rings -- and was free shipping if over $50 total so had to add a little something else for 6 bucks or so. A few years ago Osbon rings could be gotten for around $15 each -- seems price of everything that helps erections is going sky-high.
Size: "B" 1612 Large, Pink High Tension (22mm) 0.875") 1 $22.99 USD
Got that from http://www.erecaidpumps.com