Argos have got their 3 for the price of 2 offer on at the moment, until Tuesday 7th Nov 2017 - worth checking out any Star Wars stuff. Also, if you have a nectar card registered with them, you can use any points on it towards your purchase.
Also noticed that the Argos store on Ebay have a 'Buy 2 get 1 Free' offer on selected toys until the 7th Nov 2017. There are currently 91 modern Star Wars items on there and you are able to pick them up, so avoid additional postage costs.
Don't know if there is anything good as I don't collect modern stuff. Please reply on here if you find something, so others will know.