Stamp Market Index (SMI) a first-of-its-kind tool and resource, with data never before available, has uncovered a new early collector demographic.
PITTSFIELD, N.H. - NobleSpirit, a leading dealer of asset class stamps, coins and collectibles on eBay, this morning announced new information emerging from its recently introduced data analysis tool Stamp Market Index (SMI), powered by eBay.
The new data suggests that many previously help conce...
