
Well Trisha who to trust is a good question , I wouldn't sell the collections to just anybody and there is always somebody playing the middleman buying cheap and selling for a profit , that's the name of game , I don't know if you have something worth thousands but I can tell you that the fact it came from your Grandfather makes it priceless in my opinion.
Plenty of members here that can guide you and even help you identify stamps , I'm sure there are plenty here that would like to motivate and inspire you to keep them and learn about stamps and stamp collecting.
You can always take pictures or scan your stamps pages and post them here, I'm glad to see you here at the stamp community family forum.
on a side note : I'm new here on this forum but I always thought letters from before the 1850's were stampless .