I'd follow the "just move on" advice line. However...

If she has no money just take her out to dinner. Order the surf & turf with a $30 dollar bottle of wine and an expensive appetizer then when dinner is done tell her you're going to bathroom and leave.

Simple. Embarrassing. Try to get a friend she doesn't know to record the dumb look on her face with his cell phone.

But seriously, just move on.

Let alone on the telephone

not sure if this is serious.

Mount the woman, son...

Seriously?

Great! Now she has someone to listen to her blather about all her stupid crap, but doesn't have to do anything more than pick up the phone.

Epic Win for a chick!

She took an hour of her time to talk to you after you pulled that shit? She seems like a keeper to me, maybe you should give her another chance.

I'll give 100:1 odds casino cash that he ends up back with her within a month.

Any takers?

You mean when the old guy cheats on her and she goes running back to Mr. Immature?

Accepted a dinner with the EX, even though she's dating a old dude who's poor.
Thought about the EX all day.
Started an online thread about her, in which to talk about all day.
Devised a plan in which to fake interest in a date, in order to get revenge.
Waited all afternoon for her to contact me.
Cancelled fake date, in hopes that she'd be disappointed.
Talked to her for an hour on the phone afterward, hoping she'd ask again who I was with.

Yeah... sweet revenge. I totally showed that bitch I'm not interested in her anymore...

I was thinking it would have more to do with Mr Old Guy not having enough cash to treat her to a happy meal at McD's.

She probably left you for the older guy because he quit playing childish games

Her mind is made up, even if you did get her back it wouldn't be long before she kicks you to the curb again.
Why would you want to be with someone that doesn't want to be with you anyway?
If you ask yourself that question enough times you'll eventually find you know the answer and at the point you'll quite wasting precious time and you life will make a dramatic change for the better. If not you should start crossdressing and take up scrapbooking.

Nailed it

You don't have all the details......But, she was very disappointed, and she asked who I was with several times.