Your stuff is quite expensive.

You can't expect every buyer will go looking at the 'item specifics' and be happy with that, you'd do well to add a bit of a description too. Or at least provide a guide to your rating system.

And as Sugar mentioned, some of your ads don't even give the item a rating.

For instance, your ad for

Ball Pen Caran d'Ache Rieter Ballpoint Pen Silver Color, which is $121. All I know about it is it is used.

Your notes about custom charges are the main thing I see when I open your ads. That's offputting. Start with a description then have a note about custom charges under it but not so prominent.

I don't know that, even with a description, you are going to have roaring sales. You are selling things to a niche market, I doubt you'll be getting many impulse buys. Plus you are based in India.

Your feedback is good, I think you just have to slowly continue to build up your sales reputation & perhaps in time the collectors of your sort of items will start to follow you.