It's impossible to estimate over the Internet, of course :-) Unfortunately it doesn't matter what you paid for it. All that matters to buyers is what it's worth to them today, under present business and market conditions.
The value of commercial property is more variable than residential; it depends on what the buyer intends to use it for and, of course, whether that use makes economic sense. A restauranteur may like the property itself, but decide there are already too many similar places in the area. Is it zoned commercial or residential? If residential, does it have permits for 3 units? That also determines the permitted use, and strongly influences the value.