Otto Bock 'Titan' prosthetic leg knee joint, $5.

As you already may know, in this business medical usually means expensive. And when it comes to prosthetic appliances and devices like this Otto Bock Titan, this is particularly true. A few minutes taken to explore the world of prosthetic appliances and devices will pay off in great dividends!

Since I have no knowledge about prosthetic knee joints, I really can't go too much into very much detail about them. But the trick doesn't really lie in knowing all about items like this joint, but in being able to recognize costly pirces of medical equipment when you see them. All you really have to know about the world of prosthetics is that as medical equipment, they probably cost a bundle.

Since the performance of any piece of prosthetic appliance will invariably impact the quality of life its user enjoys, they are normally made with very high quality workmanship, using high quality components and materials, because they have to work safely and dependably under all circumstances. And as with so many things that are really expensive to buy new, people are all over eBay trying to find them for a better deal.

Obviously, this joint would've been much easier to identify if it had the prosthetic foot or thigh pad attached, but then its purpose would've been so obvious that our greedy seller would've wanted much more for it. I guess the real lesson here lies in being able to recognize the earmarks of expensive when they show themselves!

This Otto Bock Titan prosthetic knee joint sold on eBay for $68.