As I've said before, I've certainly gotten more than $90 of enjoyment out of it. ;O) I do wish I'd thought to swap out the 205 for the 305 and shoot the exact same shot to make an apples to apples comparison between the two. They have very similar sensor size (somewhat different aspect ratio) but the 305's pixels are a little over double the size (so 2 Mpxl vs 8). But the 305 takes really excellent pictures, is actually usable as a color camera, has much more usable camera controls, records much more sensible files sizes, etc. It seems like I have to reduce every image shot with this camera by 50%, so what's the point of the smaller pixels? On the other hand, I have literally never used this camera when seeing was not poor to terrible. On the other other hand, shooting at this image scale in a 60mm refractor really does limit the effects of poor seeing. On the other other other hand, who the heck knows.
I'm pretty much set that when I'm ready to get a real camera it will be a 20 Mpxl IMX183 based camera. It will work well with my focal lengths (prime focus on the C8 and a simple 2X Barlow for the Dob) and the huge number of pixels is really the most important factor for lunar photography. I am losing interest in DSO frankly and am leaning toward an uncooled version. DSO is just so ridiculously expensive to do well that I may just stick to wide field and use camera lenses with the a6000.