Photobucket's great (I only learnt how to use it a couple of weeks ago):
Not good at explaining and apologies if it's not clear or doesn't work for you but I'll try ...
First you register on photobucket
http://photobucket.com/register.php
Choose a username and your password.
Then you log in ...
You'll see "My album" near the top right of your screen
Click on that:
You'll see:
Upload to xxxxx (your username)
Click on the "Browse" button and select from the images you've stored of your bags or whatever.
In my case I saved pics from sites in "My Pictures" and select the pic I want, and click on "Open"
Then click on "Upload"
Wait a little and you should see the pic appear together with
"URL Link
HTML Tag
IMG Code"
under the pic
In order to attach the pic of your bag, you'll need to copy and paste what you see in "IMG Code" to the body of your post:
eg
Hope this is clear enough but if not, someone more PC-savvy should be able to help you.