That leaves you with 1 last adjustment for being two floors higher. Two floors is likely not a drastic difference in light/view so lets say $15,000 per floor, or a floor adjustment of $30,000 and you got your fair market price opinion done!
$1,445,125 - $30,000 (floor adjustment) = $1,415,125
I would expect bids to come in around the $1.41m range for this target apartment that is on the market asking $1,500,000 and I didnt have to worry about adjusting for a different building, a different layout, a different apartment size, different views/sunlight, different carrying costs, etc! Its a clean analysis using the most recent bid for the closest match to the target property that we have data for; without exposing the analysis to variables that otherwise would degrade the analysis!
: Just because a past sold comparable is more than 6 months old doesn't make it useless! In fact, its significantly more useful than switching apartment lines or worse, switching buildings to justify a deal price. If you have to use a different line in the same building, fine, but then the job is to find relevant apartment types to compare; i.e., 2BR/2BTH vs other 2BR/2BTH sales in the bldg in different lines. We have tools at our disposal today to help us do these reports and to adjust for time, that we did not have years ago; so I urge you to USE THEM!!
Like anything new, it will take some time to get comfortable with a new method over what you are used to but in the end I strongly believe the service you provide will benefit. Only go outside the building when there is no data to analyze, as these types of analysis (townhouses, walkups, etc) are the most challenging ones to produce.