Correct me if I am wrong:
Year the domain was registered: 2003-04-05
MobileAds TM Filing Date: March 29, 2007
I am not a lawyer but as far as I know "first registered first served" or someting like that, they cannot claim a TM over a domain registered previous to their TM registry so it is safe to sell it and use it. So given the case you have not any TM problem with it you could mail to the company and offer the domain but calculate you are asking a realistic price for it. Good luck.