Draculaura doesn't actually come with her bed. They are sold individually. A good price for her bed was around $20, but I've heard it's been getting harder to find it in stores right now so add a few dollars for it being "rare" ATM.
The DT 2 dolls can be found on shelves right now for $12-$15, I think, and if you can find a DT 1 floating around now, the price is about the same.
I'd say don't pay more than $45? And that might be alittle generous to the seller. I'm not sure how difficult it is to find that bed right now......
I'm not sure about used prices. Somethings lose value, some don't. Others triple in value. I'd say since you can find these dolls in store right now, these are dolls that lose value. So if you are buying used that price should come down quite a bit.......