Hi. Yes there are several homes that are coming up for an auction in Hammond. Without having an address I can not help you much but it may be the case. The agent is only protecting his commission if he showes you the home.
Auction? Is it a private auction and not a foreclosure auction. Go see it and don't sign anything, no buyer agreement that locks you to that agents company. It sounds like you have found a pushy aggressive agent, be careful and say no if you want.