Gold Certificates are where the money is.  They are the fastest growing collection material in paper money.  It is so easy to make money selling these.  You might think about placing an opening bid on any or all you see on eBay.  You might get lucky and get one at a beautiful price.  Then you can pick and choose which ones you want to go after further.
I got these two at great prices.  One looks great, but the other is worth a lot more, because it is a 'star note'.  Get in on the action.  It's fun and worthwhile.  Make some money.