The vase is like the vase pictured on p. 202 in Art of Barovier by Marina Barovier, where it's called "Graffito Barbarico Opaco." The "feathering" is called fenicio. However, the book says that it was created in 1969, so the dating is off. If it is a Barovier vase, it's worth a fair bit, which you wouldn't necessarily get on eBay, especially with fairly low quality pictures. It might be worth getting it appraised by a good dealer and looking for a good auction house. There are people around the board who can give you more specific information.