I recently purchased a nice block of amboyna burl. I looked at many places. Not eBay or generic photo places. Most of the pieces were really nice. Most were priced similarly. There was a place that wanted 3 times as much as the others. I did not see any real difference in those pieces . The block I bought is very nice. Is there really any difference in the real expensive ones vers the ones that cost around $40. Ty BH