M4 Aqua (16GB) VS SONY C4(16GB) VS HTC Desire HTC Desire 820
I'm unable to choose one as well...
anyway if you're planing on buying from eBay,
1) Tax, TRC hassle
2) Could be damaged en-route
3) Local post office thieving
4) If there's a hardware fault after couple of months, you'll have to pay for shipping and even Mobile repair shops in SL will charge you for any repair.
5) If your device get stolen/lost and if you didn't register it on TRC, they'll not search for it.
so Imo,
its not WISE to buy Mobile phones from eBay.
check with them, they are famous for excellent after sale service.
http://www.mymobile.lk/