I had experience with one chennai seller, who sold me a HP laptop costing around  36000 as brand new one,

I had some software problem with the laptop and contacted the HP company, who took the details of serial number and other product info and later informed me that this product was a used product bought by a person in USA and returned back for software problem reason,

when i contacted the seller how he can sell a refurbished product as bran new imported, he said why i contacted company instead of resolving the matter with him,

he said he will retunr the money but said first i have to send back the product,  and when i contacted ebay to give guarantee for return of the amount as it is very high amount involving 36000, ebay persons told me they cant guarantee refund of money , it is a private dealing between me and seller

in ebay never buy a product which has very high value, and also test the product and immediately invoke guarantee if you have some issue with it, without contacting buyer,  contacting buyer is only to make lapse the guarantee period of returning article,

for returning aspects   snapdeal and amazon are the best ,