A pretty cool story coming out of eBay this week, as Hannah Montana star Miley Cyrus put all kinds of autographed schwag and clothing up for charity auction in her eBay store.

The products range from “Miley’s Closet” items like dresses and tank tops worn in published magazine shoots, to signed and personalized movie posters and photos, to the grandaddy prize of all — a chance to be Cyrus’ “Roadie for a Day,” which includes a backstage meet and greet, as well as a “personalized Miley fan kit.” We’re not sure what we’d say to the star if given the chance (possibly, “Why didn’t you respond when we tweeted you about our last Hannah Montana blog?”), but it’s good to know that all proceeds from the auctions go to the Pappy Cyrus Family Foundation.

In terms of helping other eBay sellers, this is a case where a lot of bidders will end up losing out when these auctions close in a few days, and there’s a decent chance other Miley/Hannah-related sellers will pick up sales because of it. We’ll be monitoring the situation, and we’re curious to see the fall-out!

Good on ya, Miley! (Even if you don’t respond.)

Given the release next week of J.J. Abrams’ looong-anticipated Star Trek movie, wouldn’t you expect sales from the series to be up across the board? It’s a trend we witnessed and blogged about when Watchmen was released, and one you generally see when major hype meets a consumer market… So then why aren’t we seeing a spike in sales? Check out these 90-day trends and see for yourself:

It’s not as if there’s a lack of Star Trek by-products to be bought and sold… For decades, the series’ merchandise has sold at a ridiculously high clip — everything from vintage toys and collectibles, to new media and memorabilia — so maybe that’s exactly it: maybe, as we suggested regarding the Hannah Montana movie a few weeks back (our sincerest apologies for comparing the two), that ceiling’s simply been hit and is now holding strong…

(Because embittered Star Trek fans can’t be doing it by themselves, can they?)

If you spent any portion of your Easter weekend at the movie theatres, you likely witnessed part of the preteen throng that helped Hannah Montana: The Movie snag #1 honors at the U.S. box office.

For those who don’t know (there might still be a few?), the film is based on a Disney Channel sitcom of the same name, starring Billy Ray’s kid Miley Cyrus in the title role, currently in the midst of its third full season.

So how has Hannah’s Hollywood debut helped her eBay sales? Well, the show’s memorabilia has always sold remarkably well — as far back as its inception in March 2006 — and so far it doesn’t appear the film has affected a whole lot. Check out this 30-day Total Sold Listings trend for “Hannah Montana” (which covers a whopping 39,000+ listings):

Pretty steady, wouldn’t you say? Of course it is still early…

Now compare that with a similar 30-day trend for the film Hannah knocked out of the #1 slot — Fast and Furious. (Seriously, how funny is that abbreviated title? No, scratch that, how funny is that entire franchise?)

A bit more dramatic, yes. (And action-packed! And freakin’ Paul Walker!)

It’ll be interesting to see in the coming days if Disney improves on the sales of one of its most popular brands, or if the mania surrounding Hannah Montana has already reached its ceiling…