A new survey by the Piper Jaffray research group — as reported by “AppleInsider” (http://www.appleinsider.com) — says that average iPhone user considers their handset to be worth US$313 to them, while Android smartphones are valued at $220.

The investment firm polled more than 400 consumers from around the U.S. and Asia in its annual cell phone survey. The surveys were conducted in larger cities and over half of users being iPhone owners.

Piper Jaffray asked participants to come up with a dollar value for how much their current phone is worth to them. The survey found that among the 208 current iPhone users, the average value was $313, which is over $100 more than the subsidized price of the 16-gigabyte iPhone 4S, notes “AppleInsider.”

On the other hand, users of Android handsets said their current smartphone was worth $220 on average, while BlackBerry smartphone owners pegged the value of their device at $219.