Selling a 55+ condo FSBO: strategies?

[Johann Jells]

My mom is chewing my ear off as she's preparing to market her condo on the east end of Long Island, no matter how much I tell her I know absolutely nothing about doing it. I'm B&H, never sold anything! She claims most of the ~$400k sales in her gated complex go to folks already in the area who are downsizing, so she wants to advertise it in the local paper, and specify cash only, since she believes her customers will all be selling their current homes. Is this stupid or smart?

Any other advice that might be relevant in this kind of sale? I looked on Craigslist, and saw relatively little in this kind of market. Are the 55+ not really looking on Craigslist or other online spaces? I think she should have a CL ad even just to direct respondents to, for them to see a more complete description and loads of photos, but that's my "info overload" rental strategy to not waste time with BS showings. Maybe this kind of sale is different? I notice the realtor ads have very few photos.

If this is a PITA, helping her move is going to be a nightmare.....