For now im selling surveying skill, if offers are god also the others;
4300-surveying-77ped tt chip
3500-prospecting-41ped tt chip
3600-mining-45ped tt chip
4600-driling-73ped tt chip
3000- extraction 26ped tt chip
3700-geology 48ped tt chip
2500-ground assesment 17ped tt chip
970-mineral sense...