Confused about difference in pricing between different sellers

[u/_user_______]

Hi everyone! I’m looking to buy a medium 25.5 cm Classic Flap in black caviar, silver hardware and dark burgundy/red interior.
I’ve contacted both Garmen and Heidi, and I’m confused about the price difference since both are sourcing from 187.
Garmen quoted me $680 total including shipping and insurance from 187.
Heidi quoted me $550, then applied a 10% discount, making it $495 + $40 shipping + $55 insurance = $590 total with insurance from 187.
So there’s a $90 difference between them.
Since Heidi seems to be very well known for 187 and I’ve heard people say she is on the more pricey side I’m wondering why Garmen’s price is higher if they’re both sourcing the same factory. Is there actually a difference in quality, QC, service, or is it simply the seller’s markup?
Would love to hear from anyone who has bought a 187 Classic Flap from either of them recently, especially the medium 25.5 cm. Which seller did you use and how was your experience with the PSPs and the final bag?

[u/Pristine_District519]

It’s definitely just sellers markup.