Anybody tell me the cost of the ferry to skopelos staying in agia paraskevi .
Look on www.openseas.gr or www.gtp.gr and make a dummy booking to check the fares. They will vary with the ferry you choose to catch. Taxi or bus from Agia Paraskevi to the ferry quay.
One way 'economy/deck' tickets Skiathos-Skopelos (Chora):
Express Skiathos: 10.50€
Flying Cat 4: 18€