Huntsville rental/investment property. Time to sell or keep?

[Mora Clark]

Hello BP family, I'm looking for some advice here in my SFH rental in Huntsville 35810 built in 1950. It's a 3/1 rented for $800/month. I cash flowed about $300 each month. With the hype of today's market, I'm wondering if I should sell for a 40% profit or keep it for rental still. My property manager kept telling me to not increase my rent to keep my tenant blah blah but I'm seeing inventory shortage everywhere which should either increases my rent or values of my property. Any suggestions?