>The 2xxx series are fairly inexpensive, but the MPX4115 was nearly $20 last
>time I bought a single unit. (The 4115 is part of the "integrated" product
>line and doesn't require op-amp circuits etc.).

About $18 from DigiKey

John

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics