Is it ethical..?

i ordered some new pedals from chain reaction a while back and had a similar experience. basically i ended up with more expensive pedals than the ones i ordered, but the wrong tool, i ordered a pedal spanner and got a spoke wrench? needless to say i felt like i had won. online retailers are obliged to check on their products and orders going out of their despatch areas. needless to say this does not bode well for their business practices when u receive either the wrong items or indeed too many items. ask your self this, if you paid too much for an item would they be tripping over themselves to get your money back to you as fast as possible....

I've gone for both options in the past. If I'm in Tescos and they give me change for a twenty when I gave them a ten, I'll keep schtumm. If it was my local corner shop, I wouldn't.

Similarly, if I'd been sent two expensive doohickies from Wiggle, I'd probably STFU about it, but if it was someone like Charlie the Bikemonger, of course I'd send one back.

Does that make me bad?

....or send one back and ask for a refund

Its good to know that people feel that its up to them to decide who really needs money and who has enough. I'm glad I don't have that responsiblility.