My $0.02...
I keep an eye out for decently priced, quality amboyna constantly. I have learned (the hard way) that it's one of the most misrepresented woods out there either by mistake or maliciously. People sell all kinds of burl as amboyna, red malee being a common one. I'm personally leery of something being presented as amboyna if it doesn't have both the characteristic eye formation and red coloring (golden amboyna is another story). I'm not saying your piece is not amboyna or anything like that, I just want to convey the thought process I go through when spotting listings like yours and why I might not have leaped at the chance to buy it.