Booktrailers on a Budget: Feel the Magic

There’s some question about whether book trailers help sell books. Until that question is definitively answered, it seems to me that one wouldn’t want to blow one’s entire advertising budget on trailers.

The repurposing award goes to romance author Tessa Dare:

She gets an additional credit for this one, which was a fundraiser auction item to help a fellow writer in need:

Maggie Stiefvater, who writes YA paranormals, is so relentlessly creative and funny that you don’t even notice that her books aren’t mentioned until the last three seconds:

She also does a good line in playdough stop-action. I understand the labor involved, but I still wish this one was longer:

But Jeff Somers, author of the dystopian Avery Cates series (which I’ve reviewed extensively), not only ropes people in with his hilarious Ask Jeff Anything vids, which cost nothing but time and dignity,  but has recently asked his fans to do the work for a very specific kind of series trailer:

Explanation, if necessary, is here.*

What do you think?  Are book trailers effective?  Are expensive book trailers more effective? Does it even matter, as long as there are handpuppets and trews involved? Do you have a favorite example to share?

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* I have to be a part of this and am planning on using handpuppets in a way Tessa Dare would probably not approve.