Anyone can ask anything. Choosing who frames your conversation is your choice.
While the scale of a project can be helpful to the service provider, even so, instead of a volunteering dollar figures as a buyer, a conversation focused on the magnitude of project should be enough for the seller to offer a group of options.
You can't escape having to talk numbers forever, but the seller should be able to map out a thumbnail sketch of different pricing brackets and what it involves.
It's OK to want to know what "Entry Level" and "High End" means to a seller. If they can't present their services in those terms, in an initial conversation, I am sure you will be able to find someone else who can, and does.
