Tenants being difficult when viewing a potential property?

[Christopher Henning]

So we are evaluating a property and our agent is attempting to set up a showing and the tenants won't respond to the sellers agent. The rents there are very cheap now $325, should be around $550 in the current market. Do you think that the tenants are sabotaging the sale for the seller? If so is there a way to see the place by going around the tenant?