I just downloaded the Scan App for the iPhone today so I could rear barcodes and those square things.
I scanned the barcode on an old Meyle Turnsignal Box that I had picked up 10 years ago; the scan only returned one seller of this product. And that seller had it listed on German eBay; no other hits, just the one seller- 80 Euros.
It seems like a pretty cool app;