This is the main circuit of a OPA627 amp circuit. On E-bay and a few other places there is a counterfeit being sold for a few buck. A real one can set you back $20 and up. But it's not worth it is. The fake can do the job, but with higher signal noise and a higher voltage offset.
Click the following link to see a magnified view and a description of the differences.
Fake audiophile opamps: OPA627 (AD744?!)
And remember, if it's too good to be true, it probably is.
