Hi toltec,
Last year my son did a bit of sea fishing down at the southern end of Nessebar, he bought the fishing gear at the Gypsy Market, which is on tours but taxis will also take you and hang around to bring you back for about £15
My son tells me the prices were brilliant and much much cheaper than hes used to paying, he thinks the collapsable boat rod, reel with line and a couple of traces worked out about £10. While there he just asked around the bars at the seafront about fishing and he was taken out a few times for just a couple of quid for the day, and they know all the best spots