Can my landlord legally do this?

I am currently renting a property and my lease does not expire until July 1. I gave my landlord notice that I would be moving when my lease expired. Without telling me, he listed the property for sale and the real estate agent came and put a real estate lock box on my front door so she could access the condo for showings. Nothing in my lease states that I have to allow the real estate agent access for showings, and I am very upset that I was not consulted about this. I have been a renter for several years, and have looked at many properties, none of which someone still lived in. I have dealt with the real estate agent in the past, this is the only property she has listed in the past two years, and she seems to be an untrustworthy person, so I don't not feel comfortable with her in my home when I'm not here. Does my landlord have the right to list the property without my consent while I will still be living here for over a month? Any advise would help, thanks!