First of all, I would stay away from any Rockchip SoC, i.e RK3229 (quad-core), RK3368 (octa-core), etc., Android TV Boxes.
At any rate, I have noticed (but don't know if they are a scam) some eBay sellers are selling RK3368 (octa-core) Android TV Boxes under $27 + Free Standard Shipping from China / Hong Kong / Taiwan to worldwide as shown below. Unless you wanna buy an octa-core Android TV Box to run an open-source OS, i.e.
LibreELEC, you really don't wanna get any Android TV Boxes with an RK3368 Soc as shown below. That said, I just wish debian has a support for an RK3368 SoC so I can buy some and use it as a minimal desktop computer, especially if it comes with 1+ GB RAM.
- EMISH X800 4K HD TV Box RK3368 2.4G+5G WiFi Octa Core Home Entertainment $26.98
- EMISH X800 TV Box Android 5.1 RK3368 2.4G+5G WiFi Octa Core Home Entertainment $26.99
- EMISH X800 4K TV Box RK3368 2.4G+5G WiFi Octa Core Home Entertainment $26.99
OTOH, the S912 octa-core Android TV Boxes are a bit pricey (and sounded more like a legit offer) on eBay as shown below, FYI.
- Mecool KM8 P TV Box Amlogic S912 Octa Core CPU Android 6.0 HDMI 64Bit WIFI 1G+8G $31.49
- KM8P Android 7.1 HD Smart TV BOX Amlogic S912 2Ghz Octa Core 4K VP9 WiFi E4Z8 $37.90
- KM8P Smart Android 7.1 TV Box Amlogic S912 Octa Core 64bit 4K H.265 Media Player $37.95
- MECOOL BB2 Android TV Box Amlogic Octa Core 2+16GB 4K H.265 2.4+5G WiFi BT C $49.55
- KM8P Amlogic S912 Octa core Android 7.1 Set top TV box 4K WiFi AirPlay DLNA G5K9 $38.93
Regardless, this
Beelink GT1 TV Box Amlogic S912 Octa Core Android 6.0 2.4G/5.8G Dual WiFi 2G/16G GBP 15.65 + GBP 2.99 S/H = GBP 18.64 (~ US$ 25) is probably a scam too, I placed an order on last Wed 11/29/17 and the seller still has not processed to ship it out. Anyway, when I contacted the seller (on Sat 11/3/17), s/he assured that the item will be shipped out ASAP (I think the seller just lied about this).