What do you think about reselling something I bought from my friend but at a higher price?
Why would you want to sell it?
I hate this piece of junk and I'm sure I can sell it for double the price
It is wrong to take advantage of a friend if you are going to make a profit at their expense. You should split some of the extra profit with them as a good gesture.
I didn't buy it for the purpose of reselling, I bought it to help my friend out financially.
Well, if you bought it to help your friend out then there should be no problem with splitting some of the profit you get with them to help further. That being said you aren't obligated to do so. You purchased something you didn't even want with the goal of helping so of course you should be able to sell it.