The back side of this brochure contains a large ZX Spectrum poster.
Here are some more ZX Spectrum advertisements from David Reid Electronics. I bet I know what you want for Christmas!
It's all very well haveing a flash new home computer, but you probably also need a telly to plug it into! Here the PSIS advertises their home computers and small televisions back to back.
In this advertisement the Sega SC-3000 seems like pretty good value for money.