Gonna be honest with you. Other people will take advantage of your predicament and lowball, but here is what I have to say:
You are being kind of a pussy. Flashing is not hard. I can't imagine you would go through the trouble of shipping 5 GPUs and cutting your losses instead of taking 10 minutes to learn how to do something and 5 minutes to actually do it.
The fact that you would drag Lightlord's name through the mud also does not speak well of your character. You buy mining cards, you are gonna get undervolted. That's the nature of the business.
Kotarius,
I've bought GPUs from multiple sellers before, master-p (great guy), phillipma (solid trade), hell, even some random newbie a while back. Cards always came in the advertised condition. They worked right out the box, which is what they advertised, and what lightlord advertised.
Perhaps flashing the bios of 5 video cards is quick and easy for you, maybe you ran a sizeable gpu farm back in the day or work in systems administration--kudos, but I'm not you. I'm aware of the process, but I lack the skill and equipment to do it. Seriously, my desktop pc won't even fit the card, it's too big!
Do you really think saying "I'm pissed off" about a transaction is dragging the sellers name through the mud? At the time of the OP, lightlord had not responded to my PMs for two days, which is frustrating considering how often he came online during that time. Feedback's feedback. Rabble rabble.
I think you should put yourself in my shoes.