Here is some info from Bonanza
You spoke and we listened. One of the most common responses we heard in our recent Seller Survey was that it takes too much of your precious time to constantly log in to Bonanza to edit, add, and remove inventory you’re already managing on eBay.

“We understand that an entrepreneur’s most valuable asset is their time, and so we’re now offering the opportunity to automatically keep your Bonanza booth in sync with your eBay store. We’ll remove items from your booth when they sell on eBay, and we’ll add new items to Bonanza as they’re added to eBay.”
Here is a link that has more info
[URL removed]

put them on reserve, delete in Update Booth (batch edit)…

But never use synch..this will not remove sold items but

The Synchronize feature removes your items from your Bonanza booth that were previously imported to Bonanza but no longer exist on eBay.

not the other way around

What is the info on the sync? I synced multiple times and have sold only items that have already sold on eBay. Very frustrating for my buyers I am sure. Do I have to “sync” every time I sell on ebay?? I gather this is not automatic and rather useless??