Here HD offers 18-month, no interest financing on appliances (with a minimum purchase amount) ... we make use of it regularly as it allows us to put new, energy efficient appliances in our buildings and pay for them out of cashflow.We do buy second hand appliances as well, but in our area most of what you will find used is considerably older (inefficient) and in poor condition.The choice between used and new is often dependent upon the intended clientele for the building in question (and the amount of rent to be generated by the unit).

you can buy hd coupons on eBay. 

I don't think HD in the states is the same quality, but I could be wrong.

They don't carry them locally for me in Colorado but they were ~$90-99 per window which I thought was a pretty solid deal (and easy to return/replace since there is a HD everywhere).

Our price for 19 hurricane rated impact windows and 5 French doors, came in at a 27% discount from the Bid Room at HD.  

Maybe get referrals from an investor meetup or employees at HD or Lowe's, etc.

Sample is, I buy a lot of angle stops, HD sells them for $7, I buy them for about $3.

For those with many properties in a given area, it is not usually difficult to set up a commercial account with HD or other vendors, which affords varied degrees of discount.

I at HD every other day.

These were not high end either, most were from HD, Target or Walmart.