I've come across several mentions of optical chips, even a paragraph (in Vice IIRC) singing their praises as storage mediums.

But I dont see ANYWHERE in ANY book where the cost of optical chips are given as opposed to standard datachips.

Am I just missing it?

They are data chips. Remember that all data in shadowrun(that isn't wireless) travels via fiber optics which means datachips likewise would use an optical connection.

"Datachip: For those occasions when you want to transfer data by physical means—like bringing those stolen weapon specs to Mr. Johnson, when you wouldn’t trust a Matrix transfer—optical memory chips (OMCs) can hold hundreds of gigapulses of data in a small finger-sized chip, accessible by any electronic device." - SR4A, Page 330.

The cost is 1¥ is on page 331.

We have optical chips IRL right now, BTW. We call them CDs, DVDs, and Blu-Ray Discs. That's why the devices that read them are called "Optical Disc Drives".

Disc, not chip, but sure. Anyway, that's why they're immune to EMP, yay!

And, if you need to dispose of the evidence as the law is at your door, Microwave Oven!

Well dont I feel stupid now.

PDFs and the Find Command are your friend.

Does this knowledge come in useful to you? After all, you are the dumpshock demolitions mastermind...

I'm not sticking my head into a microwave oven. That's why I'm not going to be flying to the US any time soon.