I've been following the market for a while can tell you that it's not uncommon for a condo to sell for $90K over asking price. 

Look at NYC where its not uncommon to get 2-3% returns on investment properties.

Not uncommon in commercial deals, each party pays their own. 

That could mean better overall condition for the same rent, cheaper rent for similar condition or some amenity that's desirable but uncommon such as storage or air conditioning.Getting from $525 to $750 would be a huge leap in my area. 1/1 apartments similar to what you describe typically rent for around $525.

So. it’s not uncommon to request proof of rent depositsvia bank statements and corporate/LLC tax returns.

These can be single story SFRs, 2 or more story SFRs, multi-story residential MFRs, or even mixed use commercial (uncommon).

But even for cash following rentals it's not uncommon to find something for 15% on average.

It is not uncommon, especially with multifamily properties, that days on the market actually equates to days that the tenant is being difficult and won't agree to let buyers see the space.

I was under the impression something like this was uncommon (bank/listing agent saying one thing but the title coming back clean, etc.) but sounds like it's normal/expected?

Hi All, I'm under contract on my first buy and hold, and there isn't any central A/C (not too uncommon here in Chicago.)