do any other pentax cameras share the same sensor as in the k200d ? anyone know ? thanks

Yes, the K200D inhereted it's sensor (but not it's image engine) from the K10D.

The same sensor is also used in the K-m (K2000), though this camera lacks many of the features of the other two models.

Of course you can look up the differencies between the 3 bodies in our database.
But here they are in short:

The K200D is a slightly stripped down K10D. It has a Pentamirror instead a Pentaprism (so the Viewfinder is a bit darker), it uses AA batteries instead an accupack, the top LCD display is not illuminated, and I think some interface plug is missing (not mentioned in our database).
Initially, the K200D firmware was a lot improved against the (earlier distributed) K10D, but the latest firmware updates for both models put them to the same level.

The K-m (K2000) is a stripped down K200D. It has a cheaper body built (at least it feels cheaper), it misses the weather resistance, and there is no top LCD. However, it has a very slightly increased frequency for continuous shooting.

EDIT:
I forgot. The viewfinder screens of the K200D are officially not exchangeable (I think they are with the K10D).
However, the mechanism for easily changing the screen is still there. But you have to buy 3rd party screens. About the K-m, I don't know.

EDIT: I think (not sure), the K-m/K2000 doesn't support a battery grip; the other 2 do.

I think the K200D initially had an improved image engine (and supported SMD lenses right from beginning).
But, as far as I know, the latest firmware updates made them equal.

thank you stone g. , j mac, and rkk, for the information, my k200d only works on manual now, so was wondering if i should get another k200d or maybe another model with a same sensor, if there was one-- so if there are two others, maybe i should buy one of them for the autofocus, or just another k200d that has working autofocus ? what do you think ? thanks again.

Hi glinda,
I have listed the difference between the bodies in my postings. You must know what is important for you.

Prices (on (German eBay) vary more between won biddings of one and the same camera, than between the different models.
Production of the K200D started, when production of the K10D had ended. The K-m/K2000 came a bit later.

In any case, you should ask for the number of actuations. I would prefer a K10D with 8000 to a K200D or K-m/K2000 with 30000, even if it was twice as old.

EDIT:
The newer K-x and K-r do offer an even better sensor.
But used K-x in my country sell 50% higher than K200D, K-r nearly 100%.
But they both are not WR, and missing the top LCD display. I don't know about you, but I would miss the top LCD badly, as I am using it all the time.

I recommend either the K10D or K200D

Here K10D:
Pentax K10D | eBay

Here K200D (new):
PentaxWebstore.com:K200D Body Kit Only K200D Body Kit Only

Well, newer, certainly, and I believe better high ISO. I only have experience with the K200D, so I have no way of knowing, and what I'm about to say is 100% taken from other people's comments. The K200D/k2000(k-m)/K10D are CCD sensors, and the K-x and k-r are CMOS sensors. It seems that some people prefer lower ISO images from CCD sensors than they do from CMOS, but the CMOS seem to have far better high ISO capabilities. Again, I don't know this, I've just seen some people say they like the ISO100 images from the K200D better than the lower ISo images from the CMOS sensors.

Of course it's possible I'm spreading misinformation, but if so, it's not intentional, and I'm just throwing it out there as a... well, if you like the K200D, and don't need higher iso, there may be no reason to pay more for the k-x, k-r. *shrugs*

---EDIT---

I did some further reading, and it seems the actual sensor technology, CCD vs CMOS may not actually be where the difference lies, but SOME people seem to like the rendering in lower ISO of the K200D and the family it's in more so than some of the early CMOS (k-x, k-r) family - whether it was the sensors themselves or the about a million other factors between them, it's hard to say. There's no doubt that the k-x and k-r win-out in the higher iso.

The K10 is a great camera. Like was said, it does have the same sensor as the K200, and it has a lot of the controls in switches and wheels where the K200 you have to dive into the menus. It is a little bigger and heavier than the K200, but has a great feel to it. And you can find them really cheap now.

The K200D is a wonderful camera. I have a KX that I use for concert photography but I use the K200D for everything else.

kinda tempting to get that k200d from pentax, PentaxWebstore.com:K200D Body Kit Only K200D Body Kit Only is it new or refurbished i wonder ?

I would think that they'd mention it was a refurb if it was, but then again, what I think makes sense often isn't the case I saw nothing that would clarify this in either direction.

Even if it's a refurb, it's a factory refurb, and it's a good deal. YMMV, but I've been shooting a K200D refurb for three and a half years now and haven't had a single problem with it. I have a WR lens on it and don't mind taking it out in the rain and wind. It's reliable under all conditions and takes great photos.

Refurb here too, and the only problem with it is my own stupidity. Good thing they built the AF switch to fail on physical break to AF engage! Got it on woot a couple years back for 399 with the 18-55 DA L II, and couldn't be happier.