Not that I'm aware of.
Plus...you didn't mention your budget. You mentioned that you wanted these non-working Mac's to be "3 years old or newer". I hope that you don't think that you're going to buy these non-working computers for "peanuts"...and sell them for "big bucks".
This isn't the way things work in the "Macintosh World". Mac's aren't cheap to buy new or used...and Mac parts aren't cheap. So even non-working Mac's are worth a fair amount of money just for parts. Add to this computers that are only 3 years old or newer.
Many times...the amount of money you have to pay for the non-working computer + replacement parts will cost more than the computer is worth when it is working 100%.
Commonly... the part that isn't working in Mac laptops or iMacs is the logic board. And in many cases...replacement logic boards cost around $500. So $500 + the cost of the non-working computer + your labor...is the amount of $$$ you're going to have invest...with no guarantees the repaired computer will sell for more than the bucks you have invested in it.
It's the high cost of Mac replacement parts + the relatively high residual value of a non-working Mac computer...that makes this sort of project/business venture...a difficult one to profit at.
If this sort of thing was that easy...everybody would be doing it.
- Nick