Only three that I want to discuss at this time:

Q. Can you tell me something/more/give me more information/tell me about... such and such item?
A. No.  I can answer specific questions about things, but I can't discourse extensively on demand unless you offer to pay me.  Not enough time.

Q. How much does this or that cost?
A. Price is in italics at the end of the item description.  All prices in USA dollars.

Q. Can you provide me with pictures of this or that (unillustrated) item?
A. Yes if one of the following conditions is met
    1. item costs $10.00 or more
    2. item is unusual and picture is not readily available in normal references
    3. you are willing to pay $2.00 for the picture.
    Otherwise, no.