Asking for help

突然のDM失礼します. ○○○先生の本をいくら払ったか教えていただけませんか…お友達が本をproxyで買ったけど彼女は本の値段が1000円か1500円かを確認したかったです…

Apologies for the sudden DM, I would just like to ask how much did you pay for ○○○Senseis book. My friend also bought the book via proxy but wanted to confirm if the book costs 1000 yen or 1500 yen.