Of course, that is a matter of negotiation, and the landlord might not agree.While it is not uncommon for a commercial tenant to have a below-market rental rate, it is very rare for residential tenants.

It's not uncommon to see 1 set of machines for both upper and lower tenants, however the answer is likely predicated, in my opinion, on the rent tenants are paying and your expected ROI over the next few years. 

This is not uncommon.  

It's not uncommon for an attorney to discount their fee in order to get the title fee.  

However, my mortgage guy said that the way the properties are structured, (three parcels in one deed) they may be unable to do a market comp, as its very uncommon.

I have well and septic at my home and a rental not uncommon in rural areas here.

I don't know if some PM's pay a referral fee, but it's not uncommon for an agent just to recommend someone and not try to get in the middle of it.

By the way, this is not uncommon with inherited tenants.

Also, these days it’s not uncommon (in residential deals anyways) for commissions to be smaller if there is no buyers broker in the deal, making it more attractive to the seller if you have no broker of your own.

My Condo has a private entrance, 3 bedroom 2 bath, and allows dogs with NO weight restrictions which is pretty uncommon around here.