PriceSpider works much like WishRadar that we mentioned last week, except PriceSpider focuses exclusively on electronics, and searches more sites. You choose the product and set a target price, and when it sees that price somewhere online, it sends you an alert.

PriceProtectr will help you take advantage of any price-matching guarantees at 72 different stores. “If we notice the price drop any time within the price protection period, we’ll send an email your way (and we’ll keep sending them if the price keeps dropping).”

The founder of Spendfish has a collection of deal-related websites posted on his personal blog. It’s a great place to start if you’re not sure where else to look.

“A Universe of Gadget Advice” [New York Times]

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