@Linkat,
Wow.
I don't know anything about dolls, but I looked at the American Girl website and see they Start at $100!
Good deal!
Does your mother live near you? It'd be best if she and you set it up together, if she's not computer savy.
Actually, you could set it up for her. Use ask her what she wants to use as her user ID, her password, her email address (It will be best if she sets up a separate email account just for ebay, so everythings in one place. If you have her bank information, you can do the same thing to set up her paypal account.
On ebay there's an entire section with instructions/lessons on how to set things up. It isn't hard, just takes a while to get it done. I open mine quite awhile back, with no definate idea what I was really going to do with it, but for this project it made it that much easier to just jump in, post my auction and and there you go.
In a nutshell, here is what your mom needs...
An email address for her ebay and paypal accounts (like a yahoo email address)
An ebay account
A paypal account
A bank account to link her paypal to
A digital camera, or camera phone.
Boxes to ship the dolls
A postage scale
Postage (or you can print your postage right off ebay, so she'd need adhesive stickers.
It's best to set your auction to last a full 7 days, and to END in the evening, live 9 or 10 o'clock your time (EST)
You can set up the auction anytime, and for a dime per article you set it up to start at 9 o'clock on Sunday, so it end 7 days later.
If you're going to buy something, the best thing is to look for something ending in the middle of the week, in the middle of the day.
If you have any questions linkat, PM me.