We run a brokerage, rental office and an investment (we buy houses) organization so we're not as focused on a single type of seller as some of you, but at 33cents per huge/full color postcard...this is a major bargain.

We just created our own and used the office color printer to print them. 

The card color is important.

Reason is is that there is a coloration between selling junk (decluttering) and moving.

Good to meet you.Color of the postcard does matter.On small cards the two colors are pink (2 times a year, Mothers Day and Breast Cancer Awareness Month) and yellow. 

As for results try mixing up your piece type and color.

Don't use aspirin as aspirin is white, the same color as antrax.

Multi-million dollar mail-order companies never sit there and ponder what color envelope they will send.

He was retired and didn't need another car, but liked the color.

It usually costs me around $5k for that job, however, I use one paint color for ceilings, one for walls, and one for trim, so I have a 3 tome paint scheme in each house.