The pieces are quite expensive in shop search, is there a going price for the whole thing? Thanks !

Most of the pieces are under 100K in shop search, it's already a great deal

But yeah, seems to go for around 1.5M now

If you think they're expensive, then think about a time when some (three to four) of the pieces used to cost 15m or more. The map would go for ~45m. A year ago this started to change so it's worth a bargain now. Like said, each piece is around 100k so it goes for about 1.5m