Deletion of List of Roland products

Comment: This is not a sales catalog; there are no price quotes. Neither is it a directory nor indiscriminate collection of information. It is a list of products, many of which are themselves notable, manufactured by a notable company, and serves as an index to encyclopedic articles as well as developmental aid to indicate articles that might need to be written. Any products which are not particularly notable can be removed from the list, but this would still leave a valid list of many notable ones. Articles which can be improved should not be deleted (see 
Stance: keep
Cited policy: Wikipedia:Arguments to avoid in deletion discussions (WP:RUBBISH)