Jazzjet
Why not try this:
On Amazon, set search to music, then type in Blue Note. After this, click "under 5 pounds" (bottom left of the screen), then set the search criteria at the top to "Price: Low To High". Then simply scroll through the first few pages. Doing this, I've found loads of new Blue Notes for under one fifty.
The beauty of this is, that due to the liquid pricing, if you do this every few days, you'll find different titles at such prices. They might not all be the classic albums, but you really can't go wrong at those prices. I actually got the Grant Green 4CD set for one pound thirty-five doing this.