Before I start my answer you must understand what a MAN HOUR is. Lots of people do not know what it is. Let's say it took you 4 hours 30 minutes.... x 2 people that is 9 man hours.
There are a few things here:
1. Don't ever do a job first and set the pay rate after the job is done. The odds are slim to none that you will actually make any money from a job like that.
2. No one except YOU knows how much you want to make an hour. Take the amount YOU want to make an hour and times it times 9.
3. We would charge a minimum of $350 and up to $750 for something like that. When doing move outs on houses you can get those prices. As for charging those prices with an apartment complex... there is a reason you got hired on to do the job and that is because they've screwed every other NEW cleaner in town. I say new because a seasoned cleaner with any sense won't want these types of jobs because they don't pay near enough. You might get lucky but I'd say if you get $100 for the job you will be lucky. But things would have had to have drastically changed for you to make any more than that. Yeah, there might be a few that pay half way decent but they are few and far between. That is why they didn't push you to set a price. When you give them a crazy price for crazy man hours thy will reject it and pay you about $10 an hour.
Hopefully I'm wrong but I can tell you in this area the carpet cleaners still get $35 for a 1 bedroom apartment and apartment cleaners have been raised to $55 for a 1/1, $65 for a 2/1 bedroom and $80 for a 3/2 bedroom.
You see, in a real business, we charge that much to clean a refrigerator and a stove and that is why none of the bigger companies will clean empties. If they were worth our time don't you think we would already be all over it?
Good luck and let us know if they go for a decent pay rate or not.