My first reaction wasn't on the pricing as such - but on the fact it was for 25 of the modules. For an experimenter, that's probably too many. Even if they were to put in the one and only bid and they get them for $4 each, that's still 25 units.
I'd be inclined to put up an eBay listing for the sale of individual modules, with a quantity of 25. Pick a price that, when you look at it, you think: "That's not a bad price - I might grab one or two".
Of course, there's no guarantee - but it's the way I would approach this.