Are there other place to advertise the place?

The agent is likely looking for an authorization to advertise, from the owner, which is required by their MLS.

The only thing that sticks with me is the fact that when I had both Lehigh and Cape Coral houses advertised for rent the Cape houses got by far the most action.

However, its quite unfortunate that craigslist is such a scammers haven, as its otherwise a pretty good website to network and advertise, for free I might add. 

Milk, kitty kitty...Of course you can't advertise or verbalize that you want to rent to an older couple, but you can think of attributes that older people are more likely to have that you are interested in.  

Granite slabs would have been the last thing I'd think of, I'd think logistics would be a real issue.I can see and know we could get signs, banners, home welcome gifts, anything printed, embossed, hats, work and casual clothing, gadgets for advertising such as cards, pens, pen-pencil sets, calculators, watches, phones, really any small item for home, auto or business and promotional novelties.

Craigslist, backpage, and linkedin let you advertise for free.

Online Advertising?

No MLS ads from realtors, just folks sharing and advertising their properties.  

Not advertised, the lead was from walking a talking.My student located two more, by walking and talking, off market opportunities, one a failed rehab, another a move-in ready with clean up, the rehab on a sub-to maybe, the other we'll see tonight when I hit the guy up with seller financing, maybe a combination of hard money and SF, we will see.The other property is one I knew of that was going to the market, has been sitting, a tri-plex that can probably be another combination of hard money and seller financing.It will take 30 days without jumping through our tails to close one.When we began, at the end of November/ first of December I think, I told him that he could probably be a landlord by May, that was considering his investor's backing.