I bought my HTC explorer around 4 years ago and then I used it for 2 years.I purchased it for 8000 Rs.
At that time, everyone was purchasing the Samsung Galaxt Y which even though was 1k cheaper but much poorer in performance as compared to the HTC explorer.
The only limitation this phone had was the shortage of internal memory.
I solved that problem by rooting my phone and creating a partition in the SD card.
Overall, it was a very nice phone at that time as it had the big name of HTC attached to it.