Four Stage Linear Envelope
http://www.twohp.com/modules/adsr
If you had an Unicorn Account you could see a chart with the price development of this module and the average price asked for this module.
Selling this little beauty
This offer was fetched from reverb.com. You cannot contact the seller via ModularGrid. You have to visit their site.
Look up onDisclaimer: Modules listed for sale on the ModularGrid Marketplace are offered explicitly by their respective owners. ModularGrid is not affiliated to the sellers and takes no legal responsibility in any transaction.
The internet is a rough place and fraudulent behavior can occur. If you are concerned about dealing with strangers consider buying your module at an authorized dealer.