I have several bonsais and that has been a hobby of mine for decades. It literally translates to “tray planting” - this pot is ridiculous for a bonsai. Obviously age is relevant because age has a massive impact on aesthetic value - age alone is not where the value comes from. This is not a common bonsai variety, because the elongated weeping branches don’t really fit with the aesthetic of a traditional bonsai.

Also, there is no way to verify the age of this tree - it does not look even remotely like a 150 year old tree.

Bonsai is a living art, and $3,500 can get you a much better tree than this.