The rules don't allow non-paying members to discuss values. Gold members and above can discuss values with each other.
As stated above look at some of the auction sites, also the Buck knives for sale section of the BF. If I were you I'd tell your mom not to sell on a site like ebay as their fee's will eat you alive. If you have a bunch of stuff try somewhere like craigs list, then if you don't sell your stuff and have a bunch of items pay a for a year and join BF as a paid member and you can sell your items on the exchange at no extra fee's.
JB