貴金属の買取価格K24無垢 ¥4,459 K24 ¥4,365 K22 ¥3,991 K20 ¥3,582 K18 ¥3,202 K15 ¥2,497 K14 ¥2,328 K12 ¥1,968 K10 ¥1,617 K9 ¥1,440 PT無垢 ¥4,185 1000 ¥4,095 950 ¥3,880 900 ¥3,664 850 ¥3,411 800 ¥3,198 750 ¥2,985