Anyone, please? We really need to know this to figure out our prices...
If you want to be seen as a true community oriented company, then first of all you should always be fair with your clients. It means you shouldn't make such false advertising like "free shipping". There is no such thing. Everyone knows that the price is higher for the product itself to compensate the price of transport. Respect your clients and they will respect you.
Secondly, there are usually 2 approaches of picking shipping company:
1) cheap and in most of the cases a slow one (usually the national post courier),
2) expensive but quite fast (usually some courier companies like DHL, TNT, etc.).
Before our indiegogo campaign (we also made small project here), we asked people what form of transport they prefer. The answer at that time was something like "we waited 2 years, we can wait few weeks longer - make it cheaper". In that case we picked option no1. For export (outside EU) we used the cheapest form of transport, but the one which included online tracking and insurance (National Post courier) and inside EU we were able to pick fast courier for similar or even lower price. While internal transport was usually OK, the export packages sometimes were delivered after 3 months while company claimed 4-6 weeks (yes, that was sea shipping). Many people were very angry because of that fact, so after campaign we decided we will check if we can work with some other company, but from the option no2.
To check if we can make our delivery faster, we contacted with DHL, because we wanted to makea "small test-pre-order sale". We were talking several weeks and we received individual offer. It was 2-4 times higher than our prices during indiegogo campaign. We were not sure if that was a right way but we gave it a try. And it looks like people accepted it. What is more, over 70% of people received their packages within 3 days and in 7 days everyone had his package (ok, except one guy in Russia, because his package was returned, because Russia doesn't accept fast courier packages from Poland, but only postal economic ones). The best result was transport from Poland to US (NY) - 18 hours since courier picked packages. During indiegogo campaign our supporters had to wait several weeks for the package while in our later test campaign we reduced this time to days or sometimes to hours. The feedback from our backers was: "If I had to wait several weeks, it's great I could pick more expensive option".
Now you have to decide what option is better for your project. Did you make any straw poll or something like that to check if your future backers prefer cheaper or faster but more expensive transport? Try talking with people about this problem, because you won't solve it in just few hours before campaign.
Oh, and one more thing. Yes. Overseas packages can cost from $25 USD for 5kg cheap shipping to sometimes over $100 USD for faster courier. In advance inform your future clients about it, and maybe before picking the final option (on indiegogo you could only pick one price for shipping per country, so tbh client didn't have any option while making order), make some poll to check if the high cost of transport won't kill your product campaign.
I hope this will help you a little bit