For the Financial News Network, I'm Courtney Woodworth. Real estate's spring selling season is fast approaching. House prices are rising. Demand is rising. Interest rates are low. But supply? Well that's going in the opposite direction. The raw number of homes for sale is now at its lowest level in over 13 years, according to the National Association of Realtor. And it sounds like the perfect recipe for a Seller's Market. But is there more to it? Well, one agent told CNBC we're in "Real estate bubble 2.0 on steroids". With buyers competing over properties, cash is king. Nearly one third of all existing home sales in January were paid for in cash. For all of your #realestate and business news, follow me @WoodworthCourt on Twitter. For the Financial News Network, I'm Courtney Woodworth.