CoupRecoup

As companies like Groupon and LivingSocial continue to explode in popularity, I see many of my friends purchasing hundreds of unnecessary coupons that they never end up using. For those experiencing buyer's remorse from the latest local deals craze, CoupRecoup offers a very valuable service -- it provides a public marketplace for those groupons you can't or don't intend to use anymore. The site basically acts like a craigslist for online coupons, simply connecting buyers and sellers who are then responsible for completing the transaction off the site.

I find the service particularly useful when shopping or browsing for discounted discounts. CoupRecoup makes it very easy to see what the best deals are (after being marked down again in the secondary market), by providing basic sorting and filtering options. Just sort by discount percentage and you'll see things like a month of yoga classes for $10 or one-hour acupuncture sessions for $20. Still completely unnecessary? Yes, but at least I won't feel so bad when I find out I no longer have time to go indoor skydiving.