so im not sure where to draw the line here, if there is one. some people just want it to "Just Work" and will pay for it. if thats what they want, why deprive them of the service they want? if you try to deceive them into thinking its all your own work, and no one else did anything, then thats bad. but how many of those sellers do that? (seriously, i havent bothered to look. they don't do that, right?)
and some things are harder to do than others. the current wiiu hacks are easy, and arent much effort. but on the 3ds before memchunkhax2.1, i would do a temp hardmod and nfirm downgrade for people for anywhere between cost of shipping and cost of a drink. for me, the soldering is like 10 minutes of work, but to the people who i did it for, it was a crazy impossible task they could never pull off.