Most of the stuff I ordered from TV were quite expensive for what you get. The Torso Tiger, for instance, consists of the roller connected to knee pads through stretching cords that can be adjusted for difficulty. I paid about 80 toilet papers for it in 2000, and I believe it would have been better nearer 30 (though with less incentive to use it until it broke). The worst was the swivel sweeper, which became useless after only a few uses.
Some of the music is fair, though. They had Time Life collections offered, that really did offer songs from the period. I ordered a set of mid to late 1960s music, which was decent. The only fault was that most Time Life songs tend to run shorter than what you can get on iTunes or Amazon music, and get the songs you like instead of what they think you should.
The biggest issue I have with infomercial products is the long wait time. I order something directly online, it might take between 2 business days (if the warehouse is relatively near) to a week to 10 business days (if the warehouse is across the whole country). Most of these items have processing times around 3 weeks--online, it is usually a day or so. Why order something through one of those places, pay too much, and wait a month or more when you can simply go directly to a store (hopefully not walmart--they sell junk that will end up in the landfill, plus abuse employees, customers, and the neighborhood) or Amazon and get it inside a week, minus the extras I do not need, and usually for less.