Going once, going twice, SOLD ... is what some lucky bidder will hear if they win a date with Octomom ... because the mother of 14 has officially put herself up for auction to earn some cold, hard cash.

Octo -- in a last ditch effort to earn more money before she gets kicked out of her La Habra home -- has created an online dating profile for a site called What'sYourPrice.com ... a website where users can PAY other users to go out with them.

In her profile, Octo says she has 14 kids, loves to work out and loves to laugh ... and she's starting the bidding at a cool $500.

This is the latest in a slew of ploys to earn more green off her Octo fame. If you recall she also signed up for a website where she can beg her fans for money ... but so far she's only raked in a mere $2,509.

... which is $2,509 too much.

We can all thank Madonna for Octomom's topless album cover ... because the mother of 14 says the pop icon inspired her to bare it all for her music.

As TMZ first reported, Octo is releasing a single with reality TV star Adam Barta -- but they've changed the title of the song from "Get on the Dance Floor" to "Sexy Party."

Sources close to Octo tell TMZ ... the cover art for "Sexy Party" is 100% Madonna inspired. We're told the pop singer's "Like a Virgin" style and need to sing about liberation struck a chord with Octo and she wanted to pay homage to that with her album art.

Sources tell us ... the crosses in the background, the rosary and even Octo baring her boobies (sans nipples) was all in honor of Madge.

Just in case you forgot, the single drops September 4... so there's still plenty of time to uninstall iTunes.

Octomom may have stripped her way off welfare, but she couldn't strip her way out of foreclosure ... and now the mother of 14 is begging her fans for $150,000 so she can put a down payment on a new pad.

In case you forgot ... despite Octo's recent XXX endeavors, she still couldn't make the mortgage payments on her La Habra house and it was foreclosed on last month.

Sources close to Octo tell TMZ she's been given two weeks to move out, but the problem is she doesn't have enough cash to buy a house of her own ... especially one that can fit her giant brood.

Octo's solution ... set up a page on a website called GoFundMe.com, where her fans can send her money through the internet! All she's asking for is a cool $150k to get started. 

In the meantime, we're told Octo is trying to book as many jobs as possible, just in case her fans don't come through.

The bright side: at least she's not taking our tax dollars.

Jennifer Aniston and Brad Pitt, Tom Cruise and Katie Holmes, and now ... the most SHOCKING break up of all ... Octomom and Frankie G have officially called it quits.

Sources close to Octo tell TMZ, Octo has decided to end their love affair, after almost a whole  three months of dating. 

Sources tell us ... the mother of 14 ended the relationship a few weeks ago because she has way too much on her plate right now and just can't make time for a serious relationship.

In case you forgot -- Octo is currently juggling various XXX gigs, launching a singing career, getting kicked out of her house, and of course ... caring for the livelihood of many, many, small children.

We're told Octo realized early on that 23-year-old Frankie G was just too young to handle her fast paced lifestyle ... so she had to cut him loose. Sources tell us they still remain friends.

... with benefits. Maybe. Probably not.