to make your message stand out you need to put a brief description of the item in the subject box e.g. saddle for sale
photos are limited in file size to 100kb and in actual size to about 4 inches width. A photo straight off a digi camera will have a file size of about 500k at a guess so you won't be able to upload it. If you email pictures (to yourself) in windows xp you get the option to make them smaller which will normally be fine to upload here
if you get lost just click on "FRC public" above the message panel !