A sleeve of 200 just under €30 from local supermarkets. Local brands, made from black tobacco, are considerably cheaper. About 30 Euro for 200. Backi (Amber leaf) is anything from 6.50 - 7.00 Euros for 50g.
Cigarette prices in Gran Canaria are still amongst the cheapest in Europe and it is almost always cheaper to buy them in a supermarket or local shop than in the airport duty-free.
If you go over your allowances you must declare all your goods and pay tax and duty on all the goods in that category. For example, if you bring in 200 cigarettes and 50 cigars, you must pay tax and duty on both the cigarettes and the cigars because you have gone over your allowance in the tobacco category.
As already said - you cannot buy Duty Free cigarettes within the EU. You can, however, buy them Duty Paid which are generally cheaper in Spain than at an Airport.
Contrary to travelling within the EU customs territory, when in Tenerife, you can purchase VAT-free products. The number of products you can import from Tenerife tax-free must not exceed certain limits.
Only the most remote restaurants and bars won't have a card reader. Mind you, you'll often find that some shops and restaurants prefer cash for small purchases. So, it's always useful to carry a few euros to help with budgeting and emergencies. And that'll also be handy for tipping waiters and drivers.
Does TSA allow you to Carry Tobacco? Yes, TSA allows you to keep tobacco products in both carry-on and checked bags. But, you must take precautions at your end and not stuff your hand luggage or suitcase with tobacco. This is because there is a risk of tough screening or confiscation by TSA.