Update ....
Reading the info on the etoro website it appears you pay no stamp duty buying and selling Irish shares. From their website.....
Many brokers also charge a quarterly management fee and/or administration fee. eToro never charges any management, administration or ticketing fees. eToro even absorbs Stamp Duty and Financial Transaction Tax for clients where applicable: an additional saving of 0.5% in the UK, 1% in Ireland, 0.3% in France, and 0.1% in Italy.