@kewlboy9 thanks but I don't do generic items, I only sell unique products that have a specific use case, e.g., the P330. I do have HP 800 G5 but that as well has dual NVME slot.
M710q etc. are sold in the lots in the market and these vendors purchase them in the hundreds and get super cheap pricing on them, plus they will sell you cheapo SSDs and duplicate RAM which brings their costs down even more, and you cannot compete with them on price, every day I get at least 5-10 people asking me why I am selling an 8th/9th gen for x price when the same is sold on Amazon for y.
There is also a grading system, but that would be a very long and off-topic to discuss here, in short, these online sellers will be selling you C / D grade systems while charging you A-grade pricing.
e.g., the P330 that I sell is an A-grade item (no to some minor scratches, non-repaired) whereas a C/D grade would be a major repair, dent or deep scratches. the A-grade item is sold for Rs. 6000 vs a C or D grade which is sold for close to Rs. 3500.
I don't do any of this, everything I sell is 100% OG and OEM, if it's not, it is returned to the vendor. The price difference between cheap RAM and good RAM is pretty big, e.g., a 16GB DDR4 duplicate RAM would be less than Rs.1200 buck but an OEM pulled-out RAM would be Rs. 2000/-
A normal person will not be able to differentiate whether the RAM is original or a copy, they even print the same label as the original and stick it on the duplicate RAM offering a 3/5 year warranty. The same goes for SSDs.
The USB WiFi Dongle they sell you for is also very cheap around Rs. 250 whereas the internal antenna alone for a Tiny PC is Rs. 500. not including the costs of the wire and the card itself.
But general consumers will never understand such a comparison so it is best to say