Canned response for sponsors

I get emails all the time from companies asking for a video review of their software. I spend way too much time writing email responses with my pricing.

Sometimes they respond back with an actual offer. Sometimes they just offer a free video for nothing in return except a "free license" to whatever product that I'm not going to need or use.

If you have a canned response (not just a flat out rejection obviously) for these types of inquiries, I would love to see it.