The S3 version of this thread was really useful for my research, negotiating and bulk purchase options back in 2017.
Cannot seem to locate anything similar for S5... but please advise if it does exist.

Otherwise, if people are interested/inclined, would be great to create an information store of:
- Purchase Date
- Model/Body/Year/Specification/Options
- Price achieved
- State/Dealer/Salesperson

I'd post mine, but still currently shopping... so yell if you have a great deal (or interested in group purchase negotiation)