Ha ha! Watch the strop and the blade while you're flipping it during stropping, otherwise include the step 3b - Repair nicked strop

Honestly, 3+ years into honing and having honed more blades than I can remember, I still only hone for friends and rarely ever offer honing services for cash. It's not the the skill or the equipment that I doubt, but let's face it, people will send you questionable blades, which may not ever take a shaving edge. Dealing with that sort of thing is more hassle than it's worth. You can't imagine the amount of junk being passed around and people think if it's $10, or £10 and it's shaped like a razor, than it must be able to shave.... so you need to be able to judge a blade as well, before committing to service. If you get to see it in person, perhaps do few strokes on a good stone before you accept or reject it, than that's a good situation. Dealing with orders sent via post may get more tricky.