There is no way of knowing who has looked at your item.
You can only send an offer when the item you are selling is a 'buy it now' rather than an auction.
Why not just reduce the starting price if you are happy to take a lower price?
Anybody who is watching your item will see the reduced price.
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)