If the seller isn't too far away, ask to see the coin in person. Not everyone can take good photos sadly. $75 would be an EF-40, according to red book. The photos don't show detail well enough, it may very well be EF-40. Like I said, if the seller isn't to far away, you have nothing to loose.
I'm not going by that price. The ad said $75, so the seller probably graded by the redbook. EF-40 would be the $75 mark. If it's a problem free coin, and it does make EF-40, $50 would be a fair price. They sell for that on eBay.