Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. There is one coupon right now! Check this out.
Link: Banggood product page
Coupon (60.96 USD): BANGGOODSD
(CouponsFromChina.com tip: put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): 15time, 502C6B, TTxBG10, aff7off, 2019SPEDM, AFfbG10, BG66DH, BGCITYADS2019, BGVDay10%off, BGCUST, BGCOU19, bGhOnEy10, BGCOP02, BGCOO12, BGdragonBoat, BGDAC17, BGDAC5, BGSS10%SW, bgshOOp10, BgcLuBofErtA10, BGWAWAWU1, BGSHE2, BGAFF10OFF, BGCuponation10, 13f142, BGHONEY2110
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Here is price history (for all/most countries) for Cuteroom A-066 Time Apartment DIY Doll House.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).