How long and how much would you charge

Hey guys!

Quick one for you - How long do you reckon something like this should take to carve and what would you charge for it?

Im sure there are much simpler ideas or designs out there. Just wanted to get some rough estimates on this. Someone asked me if I can do a 21st birthday key like this. Googled this image and found it was like $345!! (which is $500AUD!!). It is handmade though but still…

Thanks in advance!!!