i have/had it too its a universal code i believe most of the stuff is not that great or seems quite expensive anyway, deletd my code but i am sure a google will find it.
I think it was part of a giveaway that eBay were doing.. I entered my details onto eBay's Facebook page and eventually the code came through.
Used mine on Tuesday - its for ANYTHING in the Home and Garden category, I ended up buying some bits for my wedding next year rather than camping goodies.
I'm not convinced it was a universal code as a friend of mine shared a similar code with me earlier this year and it didn't work on what I bought, but only found out after I had committed to buy!
Happy to share it , but I don't think you'd be able to use it unless you've been sent it..