Unaclocker mentioned the site http://tindie.com which looks applicable here: both as a possible place to sell small quantities of product and as a place to get useful looking electronic subsystems.

For example, one or two of the propeller boards look like they could be the basis for a video peripheral, and there are some SMD adapters which might be useful - or maybe the person who did those would be amenable to make PLCC adapters?

Are you looking for a site to bring in customers?

I found that you only need a paypal account and a website. You could actually sell anything through the forum and email here using a paypal account.

I'm not personally selling. Yes, you're right, one could reach this community using this community. Perhaps that's quite enough, although possibly other approaches would reach a wider audience. An SPI-VGA module might be of interest to people with no 6502 interest - it's even possible that Garth's RAM module would be useful in other contexts.

Anyhow, it's just a pointer, hopefully useful to someone.