Supply on Thassos
there are two big supermarkets on Thassos of large retail chains. One of Greek chain Arvanitidis, in Limenas on the way to complex Makryammos, and second one Masoutis in Pefkari (between limenaria and Potos). Therefore, if you want to make a larger purchase at lower prices in Lidl, you will have to do it on land, before moving on Thassos (next to Keramoti)
On the island, there is one large, local market on two levels, with parking in front, exists in Skala Rachoni (easy to find as it is along the main road).
You will be able to supply in all major areas in Thassos, since in each of them there are several grocery stores, butcher, fishmonger, bakery, pastry shop, pharmacy, shops with souvenirs, honey, olive oil, printing, beach equipment, clothing and shoes. Of course, the bigger the place, the number and types of such facilities is bigger.
Market is organized only in Prinos and only on Mondays. However, it is not a big miss if do not go to this market, given that the fruits and vegetables are sold only at slightly lower prices than the supermarkets on the island, and among other goods leads low quality Chinese goods. Olive oil is also not advisable to buy here, but in local factories.
Often you will, even in very small places, see vendors of fruits and vegetables that offer their goods on the truck trailer and loudly draw attention everywhere to themselves. This mini mobile market can be a great place to purchase quality fruit and vegetable with prices lower than those in the supermarket.
Fresh fish can, in addition to the fish markets, be bought directly from fishermen in Thassos ports.