The error you are getting may be due to some sort of corruption or issue in Dreamweaver. Have you tried removing the cache file to see if you get past this error? Here is a link to a thread that discusses removing this cache file. Please give this a try and restart your machine before attempting to create another recordset.
When it comes to the values you would like on the details page I'm not sure what values you would like to use for the price, since it is all on a web page I would assume that you would use the internet price but you can get either one of them on the page by dragging the column that holds that value from the recordset in the bindings panel.