Be careful what you buy on eBay.
If you buy stuff online, carefully check out the seller
My friend, Bill, just spent $95, plus postage, on a penis enlarger.  
Bastards sent him a magnifying glass.
The only instructions said: "Do not use in sunlight."

I sent away for a do-it-yourself solar powered circumcision kit, and got the same thing you described only difference is that they crossed out the not in the instructions.