Sashaaa, спасибо,
нашел :
"1) USED is stamped usually means there is significant playablity/action flaw or major body/structure flaw.
2) A "Used" stamp indicates it was returned somewhere along the factory>distributor>dealer trajectory, for whatever reason, refurbished and stamped. The reason can vary anywhere from, scratches to damaged packaging. Sold with full warrantee."
то есть как я понял с каким либо незначительным дефектом, которые вернули)