It's critically important to be clear about objectives. Is the immediate goal to 1) test out new product ideas, build a first-product prospect pipeline, expand your community, or something else? It's tempting to answer 'all of the above'. Resist that temptation to become unfocused.
If it's to get help with new product validation, then you may want to think about 2 things:
1) What is the relationship journey? What time span? What's shared (both ways)? How will the conversation/interactions play out?
2) What's in it for our follows? Why do they care? What can we say/do that will make them more passionate, opinionated, engaged, etc.?
You're on the cusp of the most addictive phase of any innovation cycle: testing your ideas with the only people who matter--those who may eventually pay you something.
So don't blurt out all your questions in the first minutes (e.g., think teenage romantic relationship initiation mistakes). But don't take forever to get around to the point either (e.g., think parents confronting teenager's indiscretions). Have a clear view of the journey (think your roadmap), and a detailed description of what you want to achieve at the next several milestones.
So to directly answer your question: If your next journey milestone has "ask about price and size", perhaps because your next critical product development decisions depend heavily on that, then ask away. Otherwise, don't.