Size 380x 300x 275 mm, Material Stainless Steel, Power 800W, Voltage 220V, Weight About 3.3KG, Capacity 12L.
Just check coupons out (with price alert and history). Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. Only one coupon available!
Link: Banggood product page
1. ($144.50): 8Couponsde
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): 502C6B, PICODICOM, 2019SPEDM, aff7off, bgssaff9, BGaDmITAd, bgchinafest, BGBFAFF2019, BGCITYADS2019, Email5, BGHOMEAPP, BGMPB2020, BGSLOVN, bGhOnEy10, 7bcdf9, BGSS10%SW, bgshOOp10, BGHome15%, BGHOMEAPP13, BGHOMEA13, BGCuponation10, BG10OFFAFF, BGwhielabel, BGYY001, BG10OFFAFF1, BANGGOODSD, BG1111KA, BGBFKA, 2022ACTIESNL, Terence, Tabby20, BGKAMAR20
(these coupons are old, so probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi SOLISTA 12L 800W Electric Oven. The lowest price was: $83.17.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).