How to find STRs on sale?

[Amit Shukla]

I know Zillow and Redfin has all MLS data but finding the properties that were previously used as STR and are on sale is very difficult. One can add ‘rental' keyword or search for few keywords but still doesn't cut it. I wish there was a site like these but totally dedicated to STR buy and sell.
what sites / techniques do you all use to find the STRs on sale?