Houston's Nordstrom has a couple of guys who provide a shoe shine service next to the shoe section. They typically do a very good job. Sometimes I sit in the chair and have them shine the pair I'm wearing, other times I bring a large duffle bag with 5-10 pairs of shoes to be shined, leave the shoes with them for a couple of days, and pick them up later. The charge for the shoe shine is $2.50. I'm curious to know what you all consider to be the appropriate amount of a shoe shine tip. Any thoughts?