The price for this specialized wrench used to extract oxygen sensors took a big jump some time after I added a link to it:
Were it not for the very specific part number that’s certainly not available anywhere else, you could take advantage of their “Guaranteed Lowest Prices” to make a quick $494.
As my buddy dBm puts it: “Such a deal!”
The Smell of Molten Projects in the Morning 
While I suspect it’s a different mechanism (“hey, someone’s pointing to this particular page, up the price!”), it reminds me of the tales of spamazon vendors ratcheting up a price inadvertently by basing their prices on each other, resulting in a feedback loop. http://www.michaeleisen.org/blog/?p=358
Looks like Northern fixed the price, now $4.99.
Re: upping the price. I’ve run across a few book listings at rather absurd prices, like $154 (used) for a book currently available at $30. The last time I looked into it, the “vendor” didn’t actually stock the books, but had to buy them then resell. Nice racket if you can find enough morons-in-a-hurry.
Just a typo. Could happen to anyone. Yeahbut…
That sort of thing happens on eBay… a lot!
Wouldn’t it be nice if somebody invented a customer service feedback loop?
Some times the goods stuff costs more:
http://www.bestbuy.com/site/coffee-39-4-hdmi-cable/1267764.p?id=1218245464814&skuId=1267764&st=1267764&cp=1&lp=1
Check out the reviews. It’s worth it.
Must. Control. Wallet. Of. Doom.
I thought the one available on Amazon for $500 or so was already the laughing stock of the entire Internet.
I’m usually the last one to get the word, but in this case I actually had the link before it went up 20 dB. [sigh]