I have to agree with Tony Pratt 1, E-bay is your best bet. If you go to an Auction House you will need to set up an account to sell items. If I read you correctly, forgive me if I am wrong, these tools are part of your Brothers Estate, . Do not be lured into the (that must be worth £xx because it cost £xx) second hand tools are only worth what someone is prepared to pay for them, which generally is not very much. Expose them to the largest audience (e-bay) and let the market dictate their value. A local auction is not, in my opinion, the place to get you the best return.