I know this guy.... that runs an apiary (you know, beekeeping) business and we go back many years. I met him just as he was getting his business started and I'd say we fall into each other's "friendly acquaintance" category. One time I did him a solid and helped him out with the zoning/planning end of things when he was moving to another community. Ever since that time if I've needed large quantities of honey (like when brewing mead) I've been able to purchase gallon sized containers from him at very low cost.
I have an uncle who worked his whole life as a plumber/pipefitter for GM. When he was younger/healthier I could always depend on him to help install a water heater, sink, or toilet.
Do you know someone that you're able to get goods or services at significant discount due to the relationship you have with them? Maybe they work on cars, do hair, or paint houses, but whatever it is they do you have a reciprocal relationship with (as in, you can count on each other to exchange or call in favors)