Quite reasonable. I do think, as you mention, context is important. Asking about the price of a meal of a food board seems perfectly fine to me. I’m also on some car boards, and members there ask price questions all the time (but only related to automotive and accessory stuff).
I also think there’s potentially an educational aspect to pricing questions, too. I forgot who was complaining about food-delivery costs (and whether it was here or on CH), but the responses were, for me, really helpful in terms of breaking down costs and such. So, while I still don’t want to get delivery that often, I don’t really begrudge the cost of delivery being separate from a tip for the driver.
Heh. I just may take you up on that. 
::snort:: And I hope you do the same w/ me…