Beethoven original musical manuscript up for auction

Two pages of Ludwig Van Beethoven's original musical manuscript for his Emperor Concerto (Piano Concerto No. 5) are up for auction. The 1809 document is expected to go for US$250,000-$350,000. The Emperor Concerto was the last piano concerto Beethoven completed. From Bonham's:

The first page is a sketch for the second theme of the first movement. Orchestral exposition, beginning with bar 3 in E flat minor with the following major version in B flat major. The further course is noted in a very shortened form (partly within the bar line division no entries, partly pauses, partly obviously only bass tones). The second page contains ideas for the second and third movements. The material of the second movement (found on staves 1-7) is the earlier version of this movement which Beethoven wrote in theme and variations form. Time signature of 2/4 and in B major (but with only four sharps in the key signature). Including the autograph markings "pizz," "tutti" and "minore" (most likely referring to the envisaged minor-mode variation) and twice the notes "Solo" and "una corda." Staves 8-11 are a sketch for the transition to the 3rd movement, with a notation of the final theme - with a different rhythm and different metric at the end "dopo presto."