One of the most common questions about Bach Instruments we receive weekly is …
"What is the value of my vintage or modern Bach Instrument?"
A great resource is using eBay’s Advanced Search capability across their various global marketplaces. Do NOT consider the asking price of a listing as the value; instead, use the Advanced Search feature to show recent SOLD listings. This is a good reference for what similar Bach instruments have been sold for.
Here are the simple instructions on how to find the “sold” values of any listing on eBay.
eBay Advanced Search - Mobile eBay APP
Follow these simple steps to determine the “sold” values on your mobile APP-based version of eBay.
source: best practice shared by BachLoyalist

