Exactly, Hifikrazy. You might as well always tell her the truth, because, no matter what figure you put on it, she'll always respond with a "What, that much??"
This will have the added bonus that if she ever does find out exactly how much you paid for it, she'll confirm that you told her the truth, which builds credibility and trust.
This will have the added bonus that if she ever does find out exactly how much you paid for it, she'll confirm that you told her the truth, which builds credibility and trust.