you can't just buy it online, we're not EU as you know. So in order to buy you need to get the invoice from the seller, pay it, then take that invoice, pay 15.750 din and apply for import license. Once you have obtained the import license you can contact the seller to send you the rifle. Then you will need import / export company to take care of the customs and tax. There are a few more steps in this arduous journey concerning the origin of the airgun, whether you need to pay just the VAT or customs too. The whole process takes at least a month to finish and at least 150e plus shipping costs, import papers...
it all depends on the seller.
The easiest to handle are Krale from the Netherlands, however some of their employees take breaks in coffee shops and can be unreasonable at times to say the least.
There are numerous things to screw up along the way, such as whether the price of the gun is shown in invoice with or without tax, if there is a stamp on the invoice and so on....
it's easier to convince transgender, vegan girl to sleep with you and eat hamburgers than to do this...