May be because you are in Kerala. Normally for Bangalore customers, we get it shipped maximum in 1-2 days. Same day shipping do happen in some cases.
As mentioned, when purchasing from ebay the buyers should be more alert than buying from everyone. You need not only look the 100% feedback, you need to also look the number of items he sold. I got 100% feedback over 100 items purchased. When I started selling, I will be starting as 100% feedback. You need to click on 'Feedback as a seller' and see how good he is. Read the feedback. Read all the negative feedback. I still buy if a negative feedback says 'shipped very late'. In that case, i just use 'contact seller' or email them and talk about this concern. Believe me, they will ship on same day if you happen to order the item.
If people are not solving cases, just tweet directly to @ebayindia initially. If they do not respond, just use a #tag or use tweet publicly with some words before (if you put @ in starting of a tweet, it do not goto your followers.). I think facebook wall also works (I do not use facebook. So less knowledge on that).
Flipkart is still one the best online shopping destination if you dont worry much about discounts Nikon D7000 SLR - Nikon: Flipkart.com
Do a search in ebay for the same. If you have a 7.5 or 8% coupon, you can get another 6-7K from discounted price of 72-73K . So you end up saving 15K (Again, you need to judge wisely from whom you want to buy).
For 15K, you can go for 1 or 2 prime lens :) . Both comes with 2 year warranty from Nikon India.
Above case if i see naptol giving the same for 50 or 60K, i wont be buying from them. I read lots of complaints. So i stay away from them.
The above was just an example.
But, If i see the flipkart price 64K and ebay price 62K after using coupon, I may end up purchasing from flipkart as i never had bad experience from them. I know them from 2008-09.
Try purchasing something from yebhi.com using try n buy. I purchased my formal shoes like that :) Good discount and correct fit.
All my slippers (puma/Adidas/reebok) are bought from yebhi under 150Rs. MRP of 650-999. Check out there services by buying some item worth less than 200rs or so. You will be amazed :).