I have checked all old coupons and price is 285.19 USD for 2.5K Android 13 (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Do you want to know what the best price is?
Latest coupon and price update (UTC):
Banggood (285.19 USD)
Banggood warehouse is located in Hong Kong. Well, is it a good price anyway? This price is higher than average price (274.99 USD) for this item. One coupon is available. Cool!
Link: Banggood product page
Price without coupon: 309.99 USD
Coupon (285.19 USD): BGHONEYSP
(CouponsFromChina.com tip: apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
There were country-specific coupon codes published on Couponsfromchina social channels and price alerts. Coupon price may vary by country, because there’re different VAT rates, shipping cost etc. There is a chance that some latest coupons are still working:
Coupon (8.4.2024, $244.99): BGRAPDT30U
Item: DOOGEE T30 Ultra G99 12/256GB 4G LTE 11 Inch 2.5K Android 13 Tablet
Countries: Greece
Aliexpress
Click here… to search for DOOGEE T30 Ultra G99 12/256GB 4G LTE 11 Inch 2.5K Android 13 Tablet on Aliexpress
Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for DOOGEE T30 Ultra G99 12/256GB 4G LTE 11 Inch 2.5K Android 13 Tablet is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).