I am in the majority which is the "NO" crowd. There are several reasons for this, some mentioned, some not expanded on.
1. The prices entered here are too small of a sample to be a true value of any card. Lately, these have been affected byt he volatile market and do not reflect the true value of cards. Just because there is a spike in prices (for whatever reasons), does not make the value of any card increase to those peak prices.
2. Price guides (without mentioning any names) are also not reliable even though some will quote those prices to substantiate the fairness of a trade. Through 30+ years of collecting, I have learned that those are also very much influenced by the spikes of the market. For example, every year in the new base sets there are probably 30-40 "RC". These are chased by the "investors" in the hobby and flipped by those who buy boxes and boxes of the new product. But many of these RC players will not make any impact in the top league of their sport and that RC that someone was selling for $10-20 is found in the commons box and can be had for $0.10 (baseballcards.ca) or $0.18 (Sportlots). There will only be 2 or 3 of those cards that hold any value, inflated as that may also be. If you doubt what I say, look up Brien Taylor or Ben McDonald or Mo Vaughn or...
3. Not long ago, I had a trade offer where the other individual had totalled the price value of the cards in the trade to be almost equal at around $30. On his side, he asked for stars and HoF while I was being offered mostly commons from the more recent years. I looked up all the cards he offered me and to no surprise, I could have gotten each and every card for $0.18 from Sportlots bringing the value down by 60%. We have thousands of cards on here with prices that are 4 or 5 times the price of what one could buy them from any seller in Sportslots or baseballcards.ca. I explained this to him, he verified what I was saying and we still came up with what was a much fairer trade. This is not a slag against him but an example of why this proposal would not work.
I think enough said. If you still think this is a good idea, not sure what more I could say.
Bruno
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Check my Profile page to see my 2023 Goals and my Lists of sets near completion (5 cards or less) or sets getting close (less than 100 cards missing and 75% complete).
https://www.tcdb.com/Forum.cfm/Page/B/ID/0/?MODE=VIEW&ThreadID=25745&C=0