The bottom line is, educate yourself about your notes, and that will ensure the best possible offer from a dealer who might try to low-ball you if you know nothing about your notes. Taking your items to a dealer does not mean you will get ripped off as some people on this forum suggest. There are good reasons why dealers can't give you more than 50% of book and it has nothing to do with them being slimy little toadies because most of them are not slimy at all. Selling stuff on your own is work, and you may not end up with much more of a return for all the work you do because most buyers don't want to spend more than 50% of book from someone they don't know for items they not really want. Put a price on your time and decide if researching your notes in published catalogues is worth your time. Only if you happen to have something super-rare and super-expensive should you hold on to it and not sell it to a dealer.