I'm selling my iPhone, but I need to transfer stuff

I'm selling my iphone 4 in a couple of days, & I need help to transfer my photos, but the thing is, on my computer, it has no memory to hold anything. So nothing will transfer onto that. I have tried iCloud, but that didn't work either.

Plug it into your computer

Well you'd have to clear space somewhere in order to store a backup. That's basically the choice you have.

Well you can't back it up to a frying pan. Make room either in icloud or your computer.

Use DropBox. You make an account and can put all your photos on there, then easily transfer them to another computer or phone by simply logging in your account.

Btw, I don't know if you already have a set buyer for your iPhone, but if you don't then check out CashiPhone.com. They're a certified site that buys iPhones for good prices and has an online quote, so you can instantly know the price they're going to pay for your iPhone!