The FlySky T6 has been superseded by the
FlySky i6 (aka Turnigy i6)
http://www.amazon.com/gp/product/B00VE3PZ3Y?keywords=FlySky i6&qid=1448171852&ref_=sr_1_1&sr=8-1
which is is mostly better. The main advantages of the i6 over the T6 are..
Better protocol AFHDS2A which supports telemetry although not in the most useful way.
Available receivers: park flier iA6, near full range iA6B - supports telemetry and CPPM, iA10
Programmed failsafe setup from the TX
Diversity antennas on the TX and RX giving more reliable range
Low power consumption (4 AA batteries vs 8 in the T6)
Compatible with older AFHDS receivers as used by the the T6
It's programming features are otherwise similar to the T6.
Cons compared to the T6 are a more toy like look but it's lighter and feels solid
Cons in general are that AFHDS2A is only supported by the FlySky/Turnigy i6 and i10 transmitters. There is no module allowing you to take the receivers to another radio (at least for now)
Normally I would suggest the i6. Its a good out of the box package However probably the best deal right now, for a limited time/quantity, is the 8 Channel Turnigy 9X mode 1 from Hobby King for $40. If you are not afraid of a bit of modding its probably the best value outside used gear.
https://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=43905
It's an
easy switch to make it a mode 2. Only seems to be the US West warehouse and I don't suppose this price will last for long. It's usually about $60-$70.
The 9X uses the same AFHDS protocol and receivers as the T6 which are not that great but with a small mod you can
replace the TX module with a FrSky XJT or DJT and get a much better radio system. There is also way to upgrade the firmware to use er9X or OpenTX easiest using the smartie board. You will want to upgrade the battery to say,
this LiFE for which you will need a LiFe charger. You can do this directly but its best to add a polarized connector since there is no reverse polarity protection. Lots of info out there on the FlySky/Turnigy 9X if you are interested.
Usual caveats about cheap stuff. Quality is variable so you are more likely to get a bad one. However often the issues are easily fixable especially with the 9X which has an enormous user base and lots of hacks and mods.