$49.39 – Power Supply DC24V / 0.5A Power over Ethernet (Passive PoE), Wireless Security WPA-PSK/ WPA2-PSK encryption, Power Consumption 7W MAX, 802.11a: up to 54Mbps / 802.11g: 54Mbps, Transmit Power 27DBm MAX, Rated Voltage/ requency input: 100-240 Va.c. 50/60Hz, LED 1x Power / 1xWAN/LAN / 1x WiFI / 3x Signal, Standard IEEE 802.11b/g/n/a/ac, Sensitivity 802.11b: -93dBm /802.11g: -73dBm / 802.11n: -68dBm, Distance Outdoors 500m / Indoor 150m(According to the actual environment change), Frequency band 2.4GHz / 5GHz /, 802.11b: 11Mbps, DDR2 512Mb, Antennas 2x7dBi Detachable Omni Directional, Chipset MT7688A+7610E, Button 1x Reset 8s, Ports 1x WAN/LAN, Flash 64Mb, Speed 802.11ac: up to 433Mbps / 802.11n: up to 150Mbps, Unit Dimensions 180mmx 50mmx 50mm (Lx Wx H).
I have just checked coupons. The lowest price I could get is $49.39 for Wavlink AC600 Wireless Waterproof WIFI Repeater (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Best price?
Latest coupon and price update (UTC):
Banggood ($49.39)
Banggood warehouse is located in China. Low/high price? Hmmm, price is higher than average (which is $42.14 right now), so better set price alert down below… There is one coupon available! Pretty cool, huh?
Link: Banggood product page
Price without coupon: $49.99
1. ($49.39): BGMAI666
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): BG3d79ff, BGGines, BG3f67c8, BG26e02d, BG3ee8cb, BGPL26MAJA0, BGHU2305, BGM1TOOLS88, BGe3bf28, BG20236Tool, BGTOOS729, BG8FORMULAMX
(probably won’t work, but you can try them out)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Wavlink AC600 Wireless Waterproof WIFI Repeater [EU] ($48.99)
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.
Price history and price alert
Do you need price history chart (for all/most countries) for Wavlink AC600 Wireless Waterproof WIFI Repeater? There we go. The lowest price was: $36.54.
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)).