Most people will find two things very upsetting.

1) If you are running an auction and use their scan. Most of the rest of us, will wonder if you really have the chip or are just scamming.

2) The worst offense, is linking to someone elses site and using the pictures. That means they pay for the hosting, do the scan and you are just stealing both.

Since you are making a want list, it would be hard to scan the chip you want.

Just ask, most people I know whould say, sure, fine, have a ball.