I have an idea for you, something I tried with local computer dealers.
What I did was to sent a request for an offer for (in my case) ryzen bundle, meaning cpu+mb+ram.
I specifically requested for a 2200G CPU with a motherboard that is running b450 chipset with at least 4 slots for memory and 2 PCI-E and 8GB of 3000MHz memory
The interesting thing was that i intended to insert their e-mail addresses in the hidden field so they don't know they are competing with the others, but made a mistake and sent a broadcast. So whatever, 3 companies replied that they don't trade with end c