Earlier this decade, people tapped their inflated home equity and credit cards to fuel a buying binge. Now, slumping home values and a credit crisis have sapped sources of cash.

Meanwhile, soaring gas and food prices haven't kept pace with meager wage growth. Gas prices have already hit $4 per gallon in some places, and that could become more widespread this summer. The weakening job market is another big worry.

Christine Hadley, a 53-year-old registered nurse from Reading, Pa., says she used to be "a clotheshorse," splurging on pricey Dooney & Bourke handbags. But her live-in boyfriend left last year, and she has had trouble finding a job.

Piles of unpaid bills forced her to sell more than 80 items, including the handbags, which went for more than $1,000 on a site called AuctionPal.com. Now, except for some artwork and threadbare furniture, her house is looking sparse.

"I need the money for essentials — to pay my bills and to eat," Hadley said.

At AuctionPal.com, which helps novices sell things online, for-sale listings rose 66 percent from February to March, much faster than the 25 percent to 30 percent average monthly pace since the company was formed in September, CEO Maureen Ellenberger said. She said she was surprised to see that most of her clients desperately needed to sell items to raise cash.

For LiveDeal.com, a classifieds and business directory site, for-sale listings for January through March rose 10 percent from the previous year.

"We can definitely detect economic stress on the part of the consumer," said John Raven, the site's chief operating officer.

On Craigslist, Buckmaster said, three of the four fastest-growing for-sale categories are tied to gas — recreational vehicles like campers and trailers, cars and trucks, and boats.

Raven noted more and more listings for furniture, particularly in areas around Miami and Las Vegas and other regions hardest hit by the housing crisis.

Baughman, who runs eBizAuctions, said that over the past four months she's been working with mostly desperate sellers instead of mainly casual ones. Most are middle-class customers who can't pay their bills and now want to be paid up front for the items instead of waiting until they are sold, she said.

The trend may be hurting secondhand stores too. Donations to the Salvation Army were down 20 percent in the January-to-March period. George Hood, the charity's national community relations and development secretary, said that was probably partly because people were selling their belongings instead.

And secondhand buyers want better deals now as well, driving prices down. Secondhand merchandise online is going for 25 to 35 percent below what it commanded a year ago, estimated Brian Riley, senior analyst at research firm The TowerGroup.

"It won't hit the saturation point until the (economy) hits the bottom and right now, we don't know when that is," he said.

In Alabama, Bateman-Lee said that she only received $30 for her TV and $45 for her DVD player at a local flea market. She doesn't have too much left to sell, but she's going back to "sort through more things."

Her $30 water bill is due this week.