When I go into eBay and look at the seller, sometimes the last product was sold 5 months ago. Does it make it valid to sell now?

eBay does not give us the data on when the last sale occurred, only that it did and by which seller.

Here is the way we look at it:

1. Someone has searched for the category that the product appeared in very recently.
2. We now are putting on an “in demand” product in our account as a result of a recent search.

Therefore, even if there was not a recent purchase on eBay, that does not dictate when the new purchase will occur nor the current demand.