Depending where you do your pawning, selling that iPhone 3G could net you as much as £202... or as little as £122.
That's where SellMyMobile.com comes in. Surfing on the recent wave of everyone from Orange to a wildlife charity recycling phones, the comparison site searches its 14 phone recycler partners (with more to join) to show consumers the site that will offer the best price for a particular phone. At launch time, SellMyMobile.com had data on more than 4,000 phones.
Consumers simply type in the model they wish to sell, and the site's search engine returns a list of prices at all partnering buyers with the best deal highlighted.
The price disparities can vary quite a lot - for example, the BlackBerry Bold 9700 can be sold for £155 at one site, but only £100 at another; while the Samsung S7350 Ultra S is going for £72 at its top price, and a paltry £25 at its lowest.
Unsurprisingly, the most valuable phone is the iPhone 3GS 32GB, then its 16GB little brother, but after that, it seems Nokia is rated pretty highly - the N97 can net you £210 while the Constellation from Vertu, Nokia's luxury arm, is going for £200.
Even if you're not selling a mobile, we found the site an interesting browse for its data on the most popular phones sold (Nokias) and the sorts of prices you can expect for that smartphone apparently worth £400 (generally around £133).