My husband (not having a wedding dress to sell - actually neither do I, we saved that money upfront by eloping...) sold a whole bunch of musical equipment to buy his bikes when he decided to take up bike racing. He knew he would only have time for one all encompassing hobby and the bike racing was definitely the healthier option. I have several pieces of camera equipment that I've sworn to put up on ebay to help pay for the race bike I bought last summer - now I just have to do it...

As for selling the wedding dress - Do it!! You'll never wear it again - and who knows what styles will be like later - I would've never wanted to wear a dress from the 70's when my parents were married, so why shouldn't it make as many people happy in the here and now as possible. Better that than ending up in a thrift store in 30 years.