Selling vouchers?

Hi,
I got a voucher today, but really don't want it, so I plan to sell it as I quite need the money.

Anyyway, a couple of questions:

How does it work if someone buys it, do I send them the voucher code and they activate it, or what? What do I send them

Also, how much would it be worth, it's for £75, and obviously there'll be a discount on that.. What sort of price should I sell it for?

Thanks,
Simon

 

They just need that code.

You can sell it for let's say $20 or $25.

So they can have a $50 bonus.

 

id give 10

 

Well, for $25 I'd rather keep it seeing as it's worth $150. 75 GBP not 75$

Anyway, thanks for the advice, +rep.