A ticket for Saturday's game between seventh-division club Schirrein and Ligue 1 side Toulouse was sold for 741 euros ($960) on Ebay, the amateur club said on their website.
The tickets were originally sold for 8 euros for the match which will be played in Haguenau in front of around 6,000 fans.
Olympique Lyon will be without midfielders Ederson, Juninho and Kim Kallstrom when they travel to Guingamp to play amateurs Concarneau in their last 64 tie on Saturday.
"Ederson is still in bed. He is out for Saturday as are Kallstrom, who is suffering from a foot injury, and Juninho, who still has rib pains," coach Claude Puel told the club's website.
The match, first scheduled earlier this month, was postponed because of a frozen pitch. The winner will host Olympique Marseille on Wednesday.
St Etienne coach Alain Perrin said knocking out Stade Rennes on Saturday would be a true achievement after Les Verts already eliminated Girondins Bordeaux in the previous round.
"If we could do something over there it would be an authentic achievement after knocking out Bordeaux on their own turf," Perrin told his club's website.
Boulogne-sur-Mer coach Philippe Montanier said he would leave his affection for Caen aside when the Ligue 2 side take on his former club on Saturday.
"I am not a nostalgic person," said Montanier, who was Caen's goalkeeper from 1987 to 1990 and from 1991 to 1994.
"I am not here to turn the pages of a photo album."
Surprise package Boulogne are currently second in Ligue 2 behind neighbours RC Lens.
