For education and discussion only. Not for commercial use. NEW YORK (Reuters) - Yesterday's computers, so often dumped for the next new model, have finally come to be treasured as historical artifacts. And techies, known more for their skills than sentiments, are waxing nostalgic for vintage models from Apple to Zenith -- and paying good money for them. "Most collectors are geeks, from kids to people who've retired, who share an interest in technology," said Sellam Ismail, a computer historian and consultant who owns more than 1,500 models and runs the semi-annual Vintage Computer Festival (http://www.vintage.org). "Some people do collect...