If you have $US3700 handy, you can buy this 180cm tall, 50kg 40,000-brick Lego Mario, the biggest ever built. It took one week to plan and 175 hours to build over 16 days.
You don't have to feel like a dorky geek for buying it, because the money will go to charity. So you can feel like a good-hearted dorky geek.
The auction lasts till November 1, and the money will go to the Ronald McDonald foundation in Netherlands, "a dutch organisation that arranges proper housing for relatives of hospitalised children, in the vicinity of clinics". [eBay via Brothers Brick]