Should I send back this motherboard?

I recently purchased a motherboard off amazon (http://www.amazon.co.uk/gp/product/B008RPZUZK/ref=ox_sc_act_title_1?ie=UTF8&psc=1&smid=A3P5ROKL5A1OLE), but when it arrived I discovered that it had already been opened. I It's not just that there are no seals on anything; one of the inner flaps has been torn so it's really obvious that it has been opened. I'm thinking I should send it back since it's supposed to be new, but I'm wondering if this is normal?

@Splatted:

Have you contacted the seller yet to ask him/her what's going on?

Thanks guys. I've contacted the seller to make sure they have this on record in case there's a problem, but I'm just going to go ahead and use it assuming it works when I have enough parts to test it.