In Finland we are allowed to receive 5 litres of wine since you are from another EU country. That requires that you send them as an invidual person, not as a company. It also requires that the wine is sent as a gift, otherwise he have to pay taxes from the total value of the shipment.

Being a wine drinker myself I'd say that people are paying 8€ per bottle on average (red or white table wine). For example the most popular red wine Gato Negro Cabernet Sauvignon from Chile costs 7€ here. So your prices are very competitive in my opinion. Cheapest Porto Wine is 10€ per bottle but I wouldn't buy that. I'd say good ones cost 20€ per bottle on average. Good dessert wine is about 12€ per bottle. These are of course my opinions and based on what wines I buy or would buy. Some people choose the cheapest wines and some don't even want to taste anything cheaper than 30€ per bottle.

I will definitely order some wines if I can get more info on what you have to offer. Great service!