Thanks for zooming-in at the end of that video. Even though I was viewing the 720p version, it was too blurry (and the focus too jumpy) to read any of the on-screen text until you zoomed-in. (In the future, if your camera supports it, use manual focus and manual brightness to prevent the pulsating effect. It won't help the refresh on old CRTs, but it will make your video more viewable. Most people who have less patience than I probably stop watching your video half way through.)
I must assume you are even asking this question because you want to sell it on EBAY. I can only offer you my personal feeling about what I would pay for something like this.
For me, I would only bid on it if I could use it with many different monitors, such as a cheap analog LCD with a VGA connector. The reason is because shipping a monitor to me in Japan is too expensive, whereas the shipping cost of the card would be acceptable. However, if I were living in the US, I would be open to having the card shipped with a monitor simply because the shipping is cheaper (and I'd likely have a larger living space too). Even so, most sellers who offer these kinds of cards always sell the card only, and never the card with the monitor -- even though a card & monitor set would make the video card have more meaning! For why buy a card if you can't use it? The fun in vintage computing is to toy and tinker, not to just buy something and sit it in a shelf unused to collect dust (or to be something ELSE to dust)!
So if you don't intend to sell the card along side that Apple branded CRT, unless the card has a VGA output, it's use is limited to most people. Indeed, the only people who would likely make use of it are those who already have an Apple CRT with a compatible cable. And I don't know too many people who would want to have the card only for sentimental value.
Simply put, to increase the value of the card, you need to present it in a way to make it most "useful" to the average SE/30 owner. (And yes, there are a good number of us out there who watch EBAY to see what other goodies we can add to our already tricked out system.) When sellers do this for me, I am more willing to not only bid, but I will bid higher too. For a card like this, I would want the manual to know how to properly install it, as well as any required software drivers.
With that said, I am not willing to pay an "outrageous sum" just because someone like Dan the Apple Mac Man gives me a thousand beautiful photos and holds my hand through the ordering process and gives me manuals, software and an original box to boot. Some people will pay through the nose because it's a "complete kit" and sold by a helpful seller, but not me. I often bid more than most, but far less than the maniacs. In other words, I am a normal vintage Mac enthusiast. I feel your card is probably worth more than $30, but it's not worth $400! And yet I've seen some SE/30 "internal CRT" grayscale video board-and-adapter kits sell for far more than $400, simply because they are so unique and incredibly practical (e.g., you don't need to fiddle with an external monitor at all, and you can make the SE/30 do something it wasn't designed to do on the stock hardware.) You've got a nifty card there, but keep pricing realistic and in perspective. And if possible, please don't use the word "rare" in your auction. It's used so much it's annoying to many people, myself especially. Use "an uncommon find" instead.
