It does say the beads are acrylic but I too missed it in the small discription so it does seem unhelpful. I won't buy them so you saved me return p&p thank you.
I agree with you about combined postage too. I did ask one seller why they didn't combine postage on the 2 books I'd bought from them but didn't get a satisfactory response. Having sold the odd book on Amazon however, I can tell you that many books cost way more than the £2.80 Amazon charge you on the 3rd party sellers behalf. I think it would be more fair to have a charge linked to weight and size which is after all what Royal Mail do.