I got unlucky hoping for a gain on my payment - price dropped as soon as a I paid and that’s very painful! I used cost and took market price from eBay. I lost $2.60, and can sell it for $4.50 in a year, and as I mentioned in a previous post marked the price to my bank debt so I can pay off my line of credit.
I used LINEST in Sheets to Calculate the Supply Curve And Ensured a 10% Margin for the Bank
I calculated the trend in sheets to raise my mood about what the price will be for the next sale. Rational collectors will buy the first few cheapest homogenous pokemon, using the competition data in LINEST I would stack up debt. So, I can’t wait to Uber tomorrow.