Go on eBay and do a search for what you are looking for,(R390A). When it comes up look down the left side you will see (Show Only), in there click on Sold Items. Go down the list, see one, click on it, now above the item click on, (See Original Listing) you will be able to see all the information from the post including pictures and actual selling price if it sold. I do this all the time.
Al, n7ioh