Enkythings Dollar$tore in Orbiuna is a great place to find a bargain, especially props and other items useful in making a webcomic from Second Life. Most items are either very cheap and/or very useful. I love the jet packs bought from here (and you would have seen a variety of those in a previous chapter). The key to making cheap costumes can sometimes be mix and matching parts from cheap prefabs. There are other cheap sources as well. Checking out Second Life Freebies gives a list of these. The Fab Free and Free*Style weblogs are also helpful.