XV century clock

[danedral]

This clock is from XV (15) sencury can someone tell me how much it aproximitly worth.

Clock is in perfectly working condition and it is from begining of his existance in my family

Im from Serbia and Montenegro (Belgrade) one friend told me (he is an expert) that i can sell it for 3,500,000.00 USD or even more.

Where to offer it and how to sell it can someone help???

heres a pictures:











Thanks for any help