VisorCentral recently discovered Consumer Depot. Consumer Depot is a national liquidator of computer overstock and demo products. They have a retail presence in Nashville, TN.
While they have great deals on many items, they appear to have a strong supply of Visors. Generally they are open box, but prices drop up to $40 more if the screen is scratched. They appear to be the perfect place to get a second PDA, or a replacement PDA at a great cost. The PDA listings are here. They also have a page for accesories. Please note that quantities are limited.
I'm not going to give specifics on the accesories but they have cradles for all models from $15, and they have cases from $9.99
For more deals, GoMadic is offering Free Shipping to anywhere in the world with coupon code "VisorCentral". GoMadic makes many types of cellphone to Visor cables. They also offer cables for the Visor Edge.
Last of all, GetHighTech has refurbished Visor Neo's for $120. Prism for $130, and Deluxes for $100. Quantities limited.