Most certainly if it is occupied!
Definitely, if this is the first time the agent has visited the condo.
There may be pets to be crated otherwise they bolt out the door.
The residence may be an antiques haven.
**Hazards may exist for which the agent must make visitors aware.
Utilities off - meaning DON"T USE THE FACILITIES!
Traditional access not available. (agent not part of MLS)
There are many, many valid reasons.
After all, the agent makes a commitment to the owner that their property will only be shown to qualified buyers. Having the opportunity to see the buyer presents opportunity to respond to questions and identify issues for which a resolution may be needed. Rather than depend on the buyer's agent to convey the community benefits and tangible assets, the responsible agent would realize they are in the best position to make the buyer aware of this units value in regards to tangible and intangible assets.
Looking at homes on Trulia is entertainment, but going into someone's place of residence should be taken seriously.The listing agent in this case, understands that. They are fulfilling their responsibility to the seller. It does not seem to be very inconvenient to place this condo on the showing schedule at the appropriate time. But, as always, there is much we do not know about this situation.
Tell us, did you make an appointment and see the condo?
Yes, the listing agent can do this. The seller must have instructed the listing agent this is the way they want the property shown. The listing agent has to follow the seller's instructions.