yes i will but I will also check whether the item which i am
selling is not cause to an accident, if it is not then i
will sell to the customer, and will provide a routine check
or service to customer.

why not? every product has its own market and there must be 
a vergin market for every product. so it does not matter if 
the product fails...if needed i'll chage the composition of 
the marketing mix according to the market reqirement and my 
product will be a hit.

yes i can sale the product in this situation i utilise the 
concept of crocodile marketing(fake marketing),ultimately i 
have to pass this to my customer i can add some additional 
features(actually which is not in the product),another way 
is that if the product is fail then i can utilise the 
concept of reverse logistic(product or package design in 
such a way that the product can reuse and recycle)by given 
this product free with any other product.

no becau it is all ready fail but we can search why pro is 
fail may be that 4ps not working

yes...but before selling it i will find out the reason why
the product has failed.....i will add some  additional
features in the product and do the proper segmentation and
positioning of the product before bringing it in the markert..

yes i do ,i would look for the reason and views from the 
customer ,definetly the customer gives the right 
information what is lacking and then making right product 
with new features.I believe grass-root customer information 
helps for development of product.

yes i sells this product to customer

Yes, i can sell the product,but only after finding out the
reason why it failed previously to grab the market.and after
that working on the drawback and make it more marketable