HI and thanks for your message on my talk page. Personally, I'm not sure the specific price information needs to be there, especially as it would be constantly changing, but if you really want to add it with an "as of" date, then the first source you named looks like it would be ok. Note that you can't use your own research, even if it seems obvious (see WP:OR), rather you would need a source that gives the specific price you want to include. Cheers, Melcous (talk) 12:44, 19 January 2017 (UTC)