Issue 1 should go for anywhere between £30-50 so if you do use ebay it's worth putting a reserve on in my opinion.
If you're not desperate for the cash I'd put all 12 starting from £250 and wait for a bit. If you want quick cash then reduce that price.
You'll probably achieve a better price by listing each magazine individually.
If you're just looking to give them a loving home where they will be cherished for eternity and most appreciated then feel free to send me a private message. I'll gladly pay for the postage.
If ebay isn't your thing then see if a local gaming store will take them on for you and sell them on your behalf.
I hope this helps.