I may be able to help some on this subject. I noticed I there was a lot of traffic coming to the website this morning from here so I thought I'd stop by to check it out. I help run the website for VRTS System, the first video + the how it works page can explain a lot about it. There's also an additional video out there that shows it working in cornstalks, hay, and cane I believe. I'd also recommend calling their toll free number and talking with Reg about it, he spent 10 years perfecting this product.
As far as the price goes, it probably depends on how many acres you rake per year. If you're breaking/bending teeth all over the place, then the system would pay for itself very quickly with the time/money saved not replacing teeth + the increased number of bales you could possibly get. That's probably the biggest unseen benefit when people first see the product, they don't realize that by keeping the rake teeth supported against one another it actually allows for more hay to get into the windrows (therefore allowing you to get more bales). When you think about it that way it wouldn't take very long to pay for itself it you're doing a bunch of acres. It's kind of like if you could buy a corn head that produced more bushels per acres with less breakdowns/maintenance but cost a little more money, would you do it?
In any case, if you're interested in the product I'd definitely call Reg and talk with him. He's at the Western Farm Show in KC today, so if you're local you can stop by. Thanks