I recently came into the proud ownership of a set of old Glazer interchangeable tools with five gouges and red handle. These are not the new QR version but the ones made, I believe, in the 90s. I understand that these were made primarily for demonstrators and instructors that traveled extensively and did not want to carry full size tools. I do not need these and before listing them in the market place I would like to get a feel for their value. Does any body have an idea?