Lego Star Wars Sets that you can buy New, for cheaper than they retailed for

 For this list, I will be using data from www.brickset.com, and the data is from the 2nd of December, 2020

Death Star - 2016 

RRP: £409.99 

New: £382.30 

Betrayal at Cloud City - 2018 

RRP: £299.99 

New: £285.62 

Millennium Falcon - 2015 

RRP: £139.99 

New: £125.38 

Millennium Falcon - Kessel Run, 2018 

RRP: £149.99 

New: £119.50 

Sandcrawler - 2018 

RRP: £109.99 

New: £100.13 

Slave I - 20th Anniversary Edition, 2019 

RRP: £109.99 

New: £90.84 

X-Wing Starfighter, 2018 

RRP: £89.99 

New: £83.43 

The Arrowhead 

RRP: £84.99 

New: £79.65 

Kylo Ren's Shuttle - 2019 

RRP: £99.99 

New: £79.56 

BB-8 - 2018 

RRP: £84.99 

New: £76.69 

Vader's TIE Advanced vs A-Wing Starfighter - 2016

RRP: £79.99 

New: £72.87 

Kylo Ren's Command Shuttle - 2015 

RRP: £109.99 

New: £71.67 

Resistance X-Wing Fighter - 2016 

RRP: £84.99 

New: £71.14 

Imperial AT-Hauler - 2018

RRP: £89.99 

New: £61.03 

First Order Special Forces TIE Fighter - 2015 

RRP: £64.99 

New: £60.97 

Y-Wing Starfighter - 2017 

RRP: £64.99 

New: £60.18 

Imperial Conveyex Transport - 2018 

RRP: £79.99 

New: £58.25 

TIE Striker - 2016 

RRP: £64.99 

New: £52.92 

Rebel Troop Transport - 2016 

RRP: £59.99 

New: £50.91 

Tracker I - 2017 

RRP: £64.99 

New: £50.02 

Battle of Scarif - 2017 

RRP: £54.99 

New: £49.03 

Major Vonreg's TIE Fighter - 2019 

RRP: £64.99 

New: £49.00 

Defence of Crait - 2017 

RRP: £74.99 

New: £48.39 

StarScavenger - 2016 

RRP: £54.99 

New: £44.51 

Snoke's Throne Room - 2018 

RRP: £64.99 

New: £43.99 

Jakku Quadjumper - 2017 

RRP: £54.99 

New: £43.73 

Scout Trooper & Speeder Bike - 2017 

RRP: £49.99 
New: £42.96 

Rathtar Escape - 2017 

RRP: £84.99 

New: £40.70 

Mos Eisley Cantina - 2018 

RRP: £44.99 

New: £38.43 

First Order AT-ST - 2018 

RRP: £54.99 

New: £33.88 

Black Ace TIE Interceptor - 2019 

RRP: £44.99 

New: £33.23 

First Order Snowspeeder - 2015 

RRP: £39.99 

New: £31.84 

Battle on Takonda - 2015 

RRP: £54.99 

New: £30.89 

First Order Heavy Scout Walker - 2017

RRP: £49.99 

New: £30.74 

Action Battle Echo Base Defense - 2019 

RRP: £54.99 

New: £29.06 

Encounter on Jakku - 2015 

RRP: £54.99 

New: £28.52 

Eclipse Fighter - 2016 

RRP: £39.99 

New: £28.04 

Sandspeeder - 2018 

RRP: £34.99 

New: £27.95 

Flash Speeder - 2015 

RRP: £34.99 

New: £27.22 

Hoth Medical Chamber - 2018 

RRP: £34.99 

New: £26.24 

Moloch's Landspeeder - 2018 

RRP: £44.99 

New: £25.52 

Pasaana Speeder Chase - 2019 

RRP: £44.99 

New: £23.66 

Resistance Transport Pod - 2018 

RRP: £39.99 

New: £21.81