@Brett ArceneauxThere is variation in markets and I don't know yours, but I would consult with a realtor.

I don't doubt it, but I kept Googling on APCO and variations of that, and I couldn't find anything.For a Weather King, the serial number appears to match "Style 3" listed at https://www.building-center.or... . 

There are so many variations with the myriad municipalities in the greater Dayton area that I actually built a spreadsheet to keep track.When you buy a property, if the previous owner doesn't pay the final bill, there isn't a whole lot you can about it.

The map below should give you a better idea of the variation in quality within the neighborhood.

You have to use the wild card '%' to manually search the public and private remarks for "mother" or variations of "guest", "suite", etc. 

We have seen appraisal variations approaching $100,000 on properties priced less than $250k.  

There's too much variation to predict exactly what each type is willing to offer as a minimum or a maximum.My partner on the rentals we own didn't believe in cash for keys at all so we never offered on the foreclosures we bought together.

Google “sub metering solutions/devices” or some variation of that.

There are variations by state depending on if the seller is in foreclosure or if you are doing lease options and things like that.

Each system has 217 key variations to choose from.Always change rekey the locks and deadbolts after a tenant moves out.We use key number 217 as our contractor key.