And no, it's not made out of gold. But the winning bidder must be made out of money.
According to Itai News, a completed RX-93 ν Gundam model sold for 926,001 yen (US$9,261) in an online auction. Bidding started at 100 yen, which is about one dollar.P
The actual model, in its unpainted and disassembled state, currently fetches around 4,600 yen (US$46) on Amazon Japan.