Future Electronics is selling them for $2.62/each. Click on the link I posted above.

If that's still too expensive for you, then build your signal generator out of discrete components (resistors, capacitors, transistors).

 

It was a good deal. It's possible to use it as a VCO, and it has sine, square, and triangle wave outputs. You can't get $5.00 in parts to do all that.

thanks due to help from forum my project was super

and made history.