The set is not available at LEGO.com and I haven’t been able to find it at any retailer. This is the cheapest you’re going to find it and it’ll only go up once it is discontinued.
LEGO Star Wars: A New Hope Mos Eisley Cantina 75290 Building Kit; Awesome Construction Model for Display, New 2021 (3,187 Pieces) – $349.99
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Amazon has LEGO Mos Eisley back in stock for retail price ($ 349.99). I can’t seem to get the right url so you need to make sure you select other buying options and choose "Amazon.com"