I love answering that question, 'cos my three bikes were all bought used or at a clearing sale. People are usually assuming I ride really expensive bikes because I ride so much, so I jump at the opportunity to tell them how you can buy a really decent bike that lasts for years with just a little more cash than most people would give for a clunker, if you shop wisely.
I don't tell them that I've paid for them several times over in parts... 
If I had a high-end bike that I didn't want to defend all the time I'd like to answer "Oh, it cost me x days/weeks/months wages", and leave them wondering. It's still considered rude to ask point-blank how much someone earns, I think
Winter riding is much less about badassery and much more about bundle-uppery. - malkin
1995 Kona Cinder Cone commuterFrankenbike/Selle Italia SLR Lady Gel Flow
2008 white Nakamura Summit Custom mtb/Terry Falcon X
2000 Schwinn Fastback Comp road bike/Specialized Jett