Yes, Nokia 3310's camera also have zoom function.
You need to ask eBay why they are taking more money from customers? Nokia 3310 company suggested sales price is Rs.3310.00 only.
No. Nokia 3310 has dedicated MicroSD slot. You can use 2 sim cards and 1 memory card all at the same time in this phone.
Yes, Nokia 3310 comes with 2.4 Inch QVGA display with 2.5D kind of glass display. You will have no problem using direct under sunlight.
No. Nokia 3310 cannot be connected with WiFi.
There are a few things that do bring back the feeling of owning an original Nokia 3310, such as the classic Nokia ringtone, the physical buttons, the tiny body, and solid build quality.
You can buy other feature phones for less than this, and the new Nokia 3310 doesn't justify the extra outlay over the simple nostalgia card it's playing.