With the deals and offers currently live on the online LEGO store, it’s not surprising to see stock shortages as in-demand models are used to take advantage of the free sets and the double VIP points. All three builds are unlikely to come back in stock before LEGO VIP Weekend ends for another year, though you can sign up to our LEGO Stock Alerts to know when they do return.
Both 7978 Diagon Alley and 21318 Tree House are not planned to retire for some time, meaning there should be plenty of chances to buy both before they are unavailable forever. The former would have been enough to earn you both the free tin sign and 40484 Santa’s Front Yard while the latter is at the right price to score the GWP as a purchase over £170 / $170 / €170
However, Stranger Things 75810 The Upside Down is scheduled to retire by December 31, 2021, meaning the next restock for the set may be the last. Rumoured to arrive next year are at least two more sets in the theme, which after the retirement of 75810 The Upside Down will be a range without any models. This report has not been confirmed by the LEGO Group.