Если это Вас действительно интересует (?!)

then 'dorogoi' may mean: dear, darling, sweetheart, sweetie, honey, hon ... what else?

I agree with Dear as well, however "love" is also very common in the meaning of dorogoi, as in "What can I do for you, love?" It could be applicable for all sorts of relationships and more personal than dear.

Hard to say without a context or an expression. What if it is used as a descriptive attribute to something that is expensive, costs a lot, is not affordable?

Although, it's so lovely of all of us to assume relationship context and come up with all these nice words!

I have just noticed that the context is said to be "saa" - same as above? speaking to a very pretty lady?
Then you should say: dorogaya

Or, if that's what she said to you, then she meant: dear, darling, etc.

Let me try to summarize.

Dear asker, if you are talking to (I emphasize "to")someone dear to you and if you apply it to someone living in the US, go for darling, honey, sweety, hon and all them sweet words you can think of.
If the person is from the Commonwealth, i.e. GB, Australia, NZ, I am not quite sure about Canada, use darling, love and then the above pussy words if you want
Use Dear as in "Dear answerer" as an introduction.
I also personally like "treasure","precious"
And finally, if it is about shopping and services, then it is "expensive, dear, costly" , etc.
Have I put it right, dear peers?
Tatyana