Why so expensive?
Here's what I do for video capture.
1. Buy an EasyCap ($30 on eBay... if you need to know how to use it just Google)
2. Buy a composite coupler ($2, if you want to do audio capture get three of them instead)
3. Buy a composite splitter ($2, if you want to do audio capture get three of them instead)
4. Get two composite video cables (price varies, depends on how far your computer is from your TV... get 4 audio cables if you want to do audio capture)
5. Plug one set of composite cables in TV, plug the other in the EasyCap.
You're all set to capture, then. That's my same exact setup (well, with the exception of the fact that I have a video switcher too)