Amy, beware new members offering to purchase entire collections.
I recently purchased a collection, flew to the sellers home, inventoried and graded every firearm. The seller and I then went thru every graded item, looked its actual value according to grade up in the Blue Book and made them a cash offer they could understand and feel comfortable with. Values have gone up a lot lately.
Unless you and/or the owner do this on every item, I can almost guarantee you'll be paid too little, especially when selling in bulk. Additionally there are some high end online auctions you may wish to list som of the finer arms in to archive top dollar, if you have the time and inclination.
Feel free to message me if you have any questions or would like me to take a look...