I know a guy in my area whose HOA insisted that the frames had to be a certain color.

If the lead bails and doesn't go to closing, that's a risk the agent is expected to take (and will color their eagerness to buy anymore leads from you, so for repeat business you will want to make sure it's likely the lead will go to closing).From agent-to-agent it's a referral and the referring agent usually gets an easy 25% of commission for making a phone call. 

New mailbox and address  lettering  1000%light staging, light furniture, bright colors ( while or off white).These items are the biggest bang for the money and effort!

But those that show you their true colors, run, and run fast.  

Cleaning the ducts does wonders too, just make sure you change the furnace filter a couple times too.

I like trainer Brian Buffini's method of showing competence and character at the same time.One thing I used to send out once a month that people really liked was a nice half page size glossy postcard that had local events for that month listed on the color postcard side, and on the back side had a note from me with a paragraph about how the market was doing.

They are simple and contain all sorts of colorful charts, graphs and photos, but again, it's just lazy. 

I'll spare you an explanation of "under color of right."

Try and have them bid " apples for apples".1- Windows   , Vinyl, Low E.2- Six panel doors and no jambs but new trim.3- two tone paint, these two colors.4- New bathroom vanity, toilet, and remove old tile with new tile. 12' X 24".Etc , etc.Brent is smart and great article, I am just adding my point of view from a seasoned  Re- hab contractor!               

I’m trying to redo my floors because they are outdated but the hardwood is in good condition just want to refinish them a different color.