quitclaim deed on property

[Kim Coffman]

I'm looking to purchase a property that comes with an additional piece of property that is separated by undeveloped city streets, supposedly making it landlocked. The agent wants to do a quitclaim deed on this second piece of property. But then she made the comment that we wouldn't be able to sell it for 5 years. Has anybody ever heard of this? 

Although there is not street, it is indicated on the plat and the city has an easement. Since there is an easement, is the land really landlocked?

Thanks for any input.