>"Hey man I'll buy out your collection for 20% under fair market price"
>Nnnuuuuggghhhh...I don't want to, but fine. You've checked the spreadsheet for current stock, right?
>"Deal, meet you at XYZ at time Alpha."
>Okay, locking in the current spreadsheet stock and seeing you at time Alpha
>*The next day*
>Hezeus phenotype looking fellow
>*Hands me the cash straight away*
>Uhm...Did you want to look at the collection first?
>"No, I trust you :)"
>*Chat for 20 minutes*
>*I get a call*
>*Buyer looks through the collection*
>*Finish my call*
>"[Frowning] yeah definitely reminds me of my childhood."
>What's up?
>"Where's the Blastoise and the Venusaur and the other good cards?"
>It got picked at over the last few weeks, did you check the spreadsheet?
>"Ahhhh...That's why you kept talking about the spreadsheet and the price kept dropping over time"
>Look, you still got a 20% discount on a huge collection, vintage is going up 1-2% d/d, you'll make it back in 3 months minimum.
>"Haha, y-yeah..."
>*Buyer walks off*
Doing a little Stalking Honse bid thinking you were getting 66% off, ey? Well, you didn't even get ripped off, and I didn't get to tell him that the 1st Edition error foil Fossil Zapdos is a PSA8-PSA9 easy.

He'll figure it out.