I have a gently used Taz 4 Dual extruder (2-3 trial uses). Too advanced for me…so rather let someone else have it.
On eBay, search for “TAZ 4 Dual Extruder Tool Head”. I just posted it, so may not show up for a few hours. Starting price is $249 with no reserve and I set a Buy It Now price of $350. Retail is $495 and is currently out of stock.
If you didn’t have any luck with this sale, consider reaching out to IT-Works (the only Official LulzBot Reseller certified to offer refurbished products). They may be interested in purchasing it from you for resale. You can find IT-Works online here: http://i-t-w.com/