PICTURES! YES! ABSOLUTELY! Color if you can afford it...nothin' beats a nice descriptive picture.
A short description is usually in order, too. I'm of the mind that a scentence or two can usually do, even in mass-produced items...even if the boots of flying are mass-produced, I'd like to see some description on how they look...are they cheap socks with a crudely drawn biridie on them, or are they all leather shoes with wings on the underside that flap up and down, made out of the pinions of a rare bird of prey (who is now exticnt due to the mass-production), or maybe they're instead made from the bladder of a beholder or something?
It doesn't need to go into lavish detail unless it's a unique item, but there should be something for DM's to tell the players it looks like...spontaneous creativity can be hard for those, and there usually isn't the time to devote to pondering what each item looks like.