If I could afford to ship for free I would, but experience shows shipping untracked leads to losses I have to bear the responsibility for, and there just isn't enough money in the business to cover it. As it is I don't even get all of it thanks to paypal, but I don't think its right to add on even more to cover their fees.
I am talking to sellers in various countries, in some cases I would hope in the longer term you can buy it locally for less using the seller's ability to ship bulk at a better per book shipping rate.
Ask your local modelling book specialists to get it and maybe we can grab them in a pincer movement!