The dealer I use is Greg here is his email/
[email protected] .I found him on Ebay and he has good service and the best Quark prices I have found. He also sells aftermarket batterys that are pre wired for the Quark for around $25. They are still 7.4 V but they are 700Mah instead of the lower stock Mah. His RTF quark is $325.00 and the Tx-less version is $295.00. Great prices! Just shoot him an email and he can answer your questions.