Some vendors refuse to allow direct RMA's through them (sapphire and Powercolour as well as a handful of other vendors do this) and will only accept returns if its through one of their certified retail partners so again the customer looks to you to deal with the RMA. If you want to charge them a small 'administration/handling fee' for it, by all means go ahead, all im saying is as a system builder who is buying new parts that come with warranty its your responsiblity to honor it.
Im not asking you to offer lifetime warranty. Its not your job to do that. All im saying is give the people the same 1year warranty as any other retailer would normally give you otherwise you'll end up with a lot of pissed off customers and probably a lot of other trouble too.
I once had a guy threaten me over the phone because I sold him a Xonar D2X and he had no idea he had to plug in a 3 pin floppy drive power cable to power it. so in his head he thought id sold him dodgy hardware. after he calmed down, the problem was easy to sort out.
“I used to be a serial upgrader like you, then i took a downgrade to the knee” -FreedomEclipse