EBAY coilover springs for 94 cav

EbaY has adjustable coilover suspension that claims that you can lower them from 1-4" just by turning a locking perch. That doesnt seem too bad until you see that they are just $39.99 plus 20$ shipping. TOO GOOD TO BE TRUE?

If you even have to ask if its too good to be true, it is. More so something comming from ebay. When buying from ebay stick to the big name brand companies i.e. Eibach, Tein, H&R, B&G, Goldline, etc. etc.