In the '60s I was with Wigfalls in Derby, and we had a great R.S. rep. named Rod Dewsbury (I think). Never got any freebies, but he would always have a good, brand new, joke every time he called. We looked forward to his visits just for the jokes. An excellent rep, and he knew all about what he was selling too, as distinct from a lot of the "driftwood" that visited places I was at later in my career.
My best freebie was a Philips colour bar generator generator I won in a competition in the Philips service magazine in the (?) late '70s. - Still in the workshop!.
Sadly, I lost my copy of the mag. with 'photo of the presentation of the said device in it.
Tony.