Japanese stores are buying back used backwards compatible PS3's for over double than they did last year due to Sony dropping backwards compatibility from new consoles. A year ago, 20GB PS3s were being bought back at ¥15,000 (US $145) for 20GB and ¥20,000 ($194) for 60GB. Now however, the 20GB can go for up to ¥40,100 ($388) and the 60GB for ¥46,000 ($446).
News Source: kotaku.com