I think £300-£400 is probably more realistic.

I've had a decent but not exhaustive "go-through", and it has some good and bad points. I know these early bibles are rarely complete, but I have found 4 missing leaves so far. On the plus side, there seems to be a whole extra section at the end entitled "The Whole Book of Psalmes Collected Into English Meeter, by Thomas Sternhold, John Hopkins and others..." and this section has the music laid out in staves. It has the same date (1629) and printer as the rest of the bible.

The title page of this section has the lovely quote "....and moreover [to be sung] in private houses, for their godly solace and comfort, laying apart all ungodly songs and ballads, which tend only to the nourishing of vice, and corrupting of youth"