Established, profitable, and worth keeping.

Usually

• Profitable today. Real, verifiable earnings — roughly $1–3M a year before interest, taxes and depreciation.
• Been around. You've survived a downturn or two.
• Runs without you for a month. A manager, a bench, or systems solid enough that we can find one.
• Customers who come back. Contracts, routes, renewals, a phone that won't stop ringing.
• No customer you can't afford to lose.
• An owner who cares what happens next.

Usually not

• Pre-revenue, or a plan with a logo.
• Earnings that only work because you never paid yourself.
• The business is really you: your license, your hands.
• An auction where the highest number wins regardless of who owns it Monday.

Not sure it fits? Send it. A division, a location, the building, or a business that went to market and didn't sell are all real conversations.