That's the trouble; it's a "piece of string" question because I don't know how far people will ride. My instinct (correct or not) is to "over engineer"
Try (!) not to fret too much. The more you do the better you will get at making those decisions.
one of my ongoing projects is building and maintaining a price list for used and new parts.
That sounds like a lot of work!! At least for recycled parts. Different components, different levels of quality, different levels of wear and tear.
Why sell new components?
I would have thought a simple display of parts deemed not useful for you that people* make an offer on. Should you discover you need that chain guard (or whatever) it just gets pulled from the display.
*I'm thinking only people reasonably clued in on bikes would be interested in buying such parts.
Unfortunately he has reported that most of his current clients are women and uninterested in anything that gets their hands dirty
Pity. From a purely recycling point of view it's a pity. Maybe art schools would be interested? Or an online search for artists? (more work for you, so a suggestion for later).
this means I now know what I've got so I can find you some wheels if/when you come by in Spring...
I'l buy the coffee
I suspect the bike shop reputation is about 3/10 and I need to work on changing that.
I dislike the word "suspect".
It's always better to know, than to suspect. Unfortunately finding out can be tricky.
I would imagine that someone buying something in your store has different expectations than if they were buying in a "normal" second hand store. Or at least some of them. For some, it will not all be about maximising value for money - some will be happy to be contributing to a good cause.
By the way, something going wrong doesn't necessarily mean "disaster!". There's good evidence that a problem properly dealt with can turn a once off customer into a customer for life.
The trick is to have a good complaints process.
Reputations take a very long time to build up and can be smashed (especially these days) in a very short time.
When things are running more smoothly there are ways of bumping it up and getting the word out that there's a new sheriff in town.
As I read back over the last page or two there's an image of a pinball being bashed around a machine coming to mind.
Everything seems to be progressing smoothly then an inspection is announced and stress levels jump.
Comments are made that are getting under your skin.
Some eejit wants you to fix punctures
We're talking about budgeting, marketing, reputation management, meetings, punctures and all you want to do is .....
fixing bikes is great; doing it and helping people and getting paid for it is a dream come true;
You're doing fine. Keep the big picture in mind. Try to enjoy the journey as much as you can and focus less on the destination.
You're learning too and will have lots of learning opportunities (not mistakes!).
Best of luck!