I have a couple properties I'd like to sell. Both tenants have been

I sold couple of duplexes last year with tenants in them..

I made sure they were on month to month lease.

I didn't let my agent put any for sale sign.

Only when I had a firm offer I notified tenants that there is possibility that this home will be sold and I need to get inspection and appraisal done.

One of my tenant was taking advantage of the covid situation

And did not pay rent for a few months, I also know he could give wrong unneeded info to the inspector..

Gave all the tenants 24 hours notice of inspection and appraisal and I was there during the whole process. If the inspector had any questions I would answer and not the tenants.

I started selling a duplex on contract and it was full. I let the tenants know what was going on. No worries from them.

Then the new buyer kicked them both out, at the same time. This was his only rental. Turns out he isn't meant to be a LL. I got the place back six years later.

I would let the tenants know you are preparing to sell. If they bail so be it. You can go in, spruce the place up and still sell.

Now if these are SFHs so you will be aiming toward owner occupied to get the crazy high prices. That might tend to make some buyers nervous because they won't know when the tenant will be gone or what condition they will leave the place in.

Guess I am on the fence here. Either way has its benefits. Keeping the places full makes you money while you wait. Empty will probably draw a better crowd if SFH.