OK, thanks for the replies so far everyone! Evidently I left out some key info about me and where I am in my life/thinking.
* I am 55 and have downsized from holding and improving and flipping many properties in the past. I am finished with all the work and with all the leveraging to purchase more; I am making things as simple as possible after 25 years of RE investing.
* I own a 12-unit building which gives me about 120k NOI and rents are about $150/200 below market.
* A 5.5 cap rate would give me 2 million for the building and I have no debt.
* I live in a very affordable city which came in 2nd place in the best places to retire this year - Harrisburg, PA. As I said, I'm kind of in retirement mode now.
* ALL of my net worth is in RE, I have nothing in stocks/bonds/etc.
* I manage my 12-unit building myself and after improving every unit (kitchens, baths, etc) myself, I have very little to do to make that 5.5% ROI, but it'll be more later, I'm sure.
* I am considering selling because: (1) I am a little tired of managing, (2) The cap rates would give me an incredible price in this moment, (3) MOST OF ALL, I see government control creeping in which will cause the RE sector to downturn badly.
Example of unjust government control: (1) Calls/Bills introduced to "cancel rent," (2) Federal rent controls just introduced, (3) Eviction moratoriums, (4) Forbidding the use of credit scores to not accept a prospective tenant, (5) Banning criminal background checks, (6) Requirement to accept dogs for simply emotional reasons, (6) Banning use of eviction records to accept a prospective tenant, etc.