What’s the zip code?  

Everything is done according to the code but I want to know what are my options here in Baltimore City, Maryland. 

This can also work if you happen to have a smaller unit--try finding larger units within the same neighborhood or zip code so you can use them for comparison.

Mind any potential code violations, deferred maintenance, and your big ticket capex items(re-paving parking lot, loose handrails, amenity repair, roofing, scope plumbing lines, etc)It’s unclear to me if you’re buying this with your money or other peoples money.

Make sure you are following building code and fire code.

You could always check with a local code via the building inspector or a realtor.

You have to find a property in the same or neighboring zip code that is as close as possible in size, bed,baths, etc.

What @James Wise said.Plus, 60 amps, that might be old 110V service and those old fabric covered wires.The flickering and surging might be the OLDEN DAYS fabric wires arcing inside the walls (a fire on it's way to starting).Even if the outlets have 3 prong holes and you see some ROMEX, it doesn't mean they redid the whole system with ROMEX, there will be hidden from view junction boxes that might still have old wire in them, or old plastered over live wires.Fix it quick--flickering and surging is not a good thing--it's very dangerous.You may be forced by law to bring it up to current code, GFCI Breakers, etc... ($$$$)And make sure the smoke detectors are up (not expired) and working properly.I shudder to think how you will feel if someone burns to death in there.

I personally find zip codes that meet my criteria then vet individual deals.

Keep everything to code (smoke detectors, windows and doors, etc).