I have a few bass clarinet mouthpieces for sale on eBay, 2 Fobes and 1 Grabner, which may be of interest to the list. My eBay name is agrenci for those who want to take a look - bid liberally :-)
These are all good mouthpieces, just not fitting my needs, and I really can't justify keeping them. I have "collected" a lot of mouthpieces, etc. over the years - far more than I use. I may list some other clarinet and bass equipment in the not too distant future.
If you have any questions about the mouthpieces, please email me privately.