I ain't the smartest person (ask my woman, I'm sure she'll spend a day telling you about all the things I'm wrong about). And I don't know all the values of various chips. Been only the last couple years that I've had the time and poor judgement to start collecting chips more than onsie-twosies.
But something I do know is that in my year here, I've determined that there are people that are vendors, harvesters, and so forth. Most don't hide it, and advertise their services. I know that if they have something that I want, it may not be at the best price. This is something they do on more than a rare or very occasional basis. And some have storefronts, employees, and so forth. Makes sense that they'd charge more.
Then there's the collectors/hobbyists. For the most part, I don't see the noted vendors/harvesters picking up here and reselling here the barrels or stacks or small sets that collectors are cycling through. It's really not their gig.
I've seen some chips get resold after a time, sometimes for a bit more, sometimes for a bit less. Often, chips have been sorted/cleaned/murdered/flattened/whatever.
For those here that have no issue with picking up and immediately asking 3x/4x/5x what they paid, would it make sense to have them listed as a "vendor"? Although I personally am not entitled enough that I feel like I need to immediately ask/charge 3x/4x/5x whatever I paid, simply because "derp-derp, I was on the inter-netters, I have to eat, my dog has fleas and MY TIME being on the inter-netters is so valuable, that I will also have to increase my price for every question I have to answer about them as well. Because MY TIME is so much money! The porn sites should be paying ME for being on the inter-netters because MY TIME is so valuable" I -personally- have an issue with rewarding someone being opportunistic and snagging/instantly reselling on a community forum/site primarily geared towards collectors/hobbyists. Site like fleabay? Totally a commerce site, no holds barred, I know that as soon as I go there.
Personal opinions aside, everyone should be able to sell whatever they want, for however much they want. Common sense also says whatever someone paid for a chip a few years back should be irrelevant to whatever it's worth and being sold for now. But I've said it before, and I'll say it again - if it's going to be OK for someone to snag and then immediately relist for 3x/4x the price - then it's got to be OK for anyone else to post/let it be known what they'd picked them up at, with this being a community site and not a sales-only site.
Could also add (in the site software, VERY easy) a "hobbyist" badge that shows up in their info/below their avatar. For people that have no interest in being "opportunistic" and flipping for 2x or more. Easy to add, easy for staff to remove.
LOL, on my old site we also installed a FOK U button, but it was a smaller, more private site than here. Provides a bit more 'how I really feel' than a dislike button