It will be important for you to get the detail right on your web site if you are to gain and keep customers. You will need to decide the terms of delivery - will you include shipping costs, import duty, tax, documentation fees etc? This is usually shown with an INCOterm - see http://en.wikipedia.org/wiki/Incoterms In some countries the import duty will be tree of four times the cost of the product to be imported and there will be more taxes to add on top of that.
To find out what import duty, taxes and other formalities apply to your products you need to work out the customs tariff code. Use this site for exporting https://www.gov.uk/trade-tariff.
Use this site to look at the import duty, taxes and formalities at destination http://madb.europa.eu/madb/indexPubli.htm
The origin of the products can make a difference to the requirements and taxes - this is not the place the goods are shipped from but the place where they are manufactured plus the place where the raw materials came from.
You will also need to think about freight costs - in many cases the courier fees will be more expensive than the products. Courier companies do have excellent on line tracking.
Packing also needs to be suitable for reasonably rough handling so your packing costs should be factored in.
Happy to help further if you wish or you might like to consider taking a training course to help you understand export. I run public courses if you are interested.