Raspberry Pi 3 Model A+ Plus 3A+ (Banggood, Aliexpress: 512MB LPDDR2 SDRAM, Extended 40-pin GPIO header, Single USB 2.0 ports, 2.4GHz and 5GHz IEEE 802.11.b/g/n/ac wireless LAN, Broadcom BCM2837B0, Bluetooth 4.2/BLE, Full-size HDMI, Cortex-A53 (ARMv8) 64-bit SoC @ 1.4GHz (the best price with coupon)).
Price history, coupons and price alert are available on this page. Do you want to know what the best price is?
Aliexpress
There’re some similar (or not) items on Aliexpress
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. There is one coupon right now! Check this out.
Link: Banggood product page
1. ($42.91): 13f142
just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): 502C6B, e2bcea, elec, 2019SPEDM, AFfbG10, BGBFAFF2019, BGCITYADS2019, BGE13, BGAFF10OFF, bGhOnEy10, BGdragonBoat, BGSS10%SW, bgshOOp10, BgoFErTaSchInA10, BGELIG0920, BgcLuBofErtA10, BGRUMB15, BGCuponation10
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Price history (for all/most countries) for Raspberry Pi 3 Model A+ Plus 3A+ is here. The lowest price was: $31.32.
Price records source(s): Gearbest, 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)).