How to know when it's time to end listing

[mmseven4]

Hello community. I tried to find that information on Youtube and google, but all what i got was "How to end listing" , so im writing here.

I sell new car parts on ebay and i list 15 new listings each day. I have found niches of exact parts and i put all of them for sale, so that exact part can be for any car and engine model.
But how to understand when it's time to remove that part from ebay? Like should i really wait for 2 years to see if no one of these items is getting sold to end it? Or maybe there is a possibilities to go through any specific statistics which display how many customers search for exact item or if there is any interests.

I will be very thankful for any useful information.
Thanks before!

[downunder-61]

I have lately seen a few posters saying that some items listed for more than 4+ years (some longer) have been getting sales. I guess it is up to you, only you understand your product and your business model.

I don't see any adverse reason for not letting it stay listed, but again, your choice.