Damn $266? You have to question the integrity of that. Yeah $400-450 is an incredible deal. The RTX line was insanely price inflated upon it's first release and still is to this day. I picked up a MSI GTX 1080 TI Duke right before/after the RTX release for about $550 USD and i'm pleased with it's performance.
You just have to make sure to:
- Purchase from a reputable seller
- Make sure the sale as at least a 30 day money back guarantee
Once you receive it:
- Check the bios version.
- Check the clocks both idle and under load.
- Check the temps both idle and under load.
Note:
- A good thing to check to see if it has been tampered with for mining is many stock/unaltered cards fans don't spin when idle. If yours has that feature (Check that first) and the fans still spin when idle is kind of a dead give away.
- Just because they did mine with the card doesn't mean it's damaged. In fact miners probably take better care of those cards than the average gamer by undervolting them and adjusting the fan curve to make sure they constantly run cool and the longevity of the hardware is barely impacted.
- If the seller doesn't return questions and sneaks around the questions:
Has the card ever been used for mining?
What is the bios version on the card?
4. If the seller is selling the same card 1 of 50 can be suspicious but isn't necessarily a deal breaker.
It's usually a red flag. Many times you'll still get a very usable card, I just steer clear and don't to business with flakey people. Then again I've been in IT for over a decade now and I can smell a snake lol.