This is a great idea. Hearting an item does this somewhat, but the reach isn't as great as it is with Facebook. I definitely saw an increase in views once the Like button was added to the listings. When I listed a new item the day after the Like button went live, I got twice as many views as usual, and this increase lasted for 4-5 days instead of the usual 2 days. It's really amazing how Facebook can make things go viral. I think this might work best for unique items in niche markets.
