Kanye West's "808s & Heartbreak" arrives at No. 1 on the Billboard 200 with 450,000, giving the rapper his third straight chart-topping album. However, his sales start is his lowest since his first album, "The College Dropout," bowed with 441,000 in 2004 . . . The much ballyhooed return of Guns N' Roses doesn't quite fire up the chart as some expected. The band's "Chinese Democracy" starts at No. 3 with 261,000 . . . Also starting high this week: new sets from Ludacris and the Killers, an EP from Coldplay and Barry Manilow's latest "Greatest Songs" release.