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The purpose of the data description document is to provide the information needed to understand and use the various data displayed on the site.
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decimal
The for sale price is the price at which you put the item up for sale.
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decimal
Official LEGO® selling price.
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decimal
Displayed only if you have activated the parameter shops fees.
This is the price displayed on selling platforms that charge fees to buyers, such as Vinted or Leboncoin. As a buyer, you’ll have to pay this price plus the fees.

listed price=purchase price−feeslisted\,price = purchase\,price - fees

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decimal
The margin price is the price at which you must sell the item purchased at the purchase price to obtain a margin rate defined in settings.

margin price=purchase price∗(1+margin)margin\,price = purchase\,price * (1+margin)

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decimal
Item value according to the average of similar items for sale on Bricklink®. When no copies are for sale on Bricklink®, Brickyfi uses ChatGPT to provide a price estimate.
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decimal
Price at which you must buy the item in order to sell it at the selling price and obtain a margin defined in settings.

purchase price=selling pricemargin+1purchase\,price = \frac{selling\,price}{margin+1}

For items in your collections (except for wishes) this is the price at which you purchased the item.
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decimal
The profit is the profit you will make by buying the item at the purchase price and selling it at the selling price.

profit=selling price−purchase priceprofit = selling\,price - purchase\,price

For the for sale items this is the profit you will make by selling at for sale price the item purchased at purchase price.

profit=for sale price−purchase priceprofit = for\,sale\,price - purchase\,price

For sold items this is the profit you made by selling at sold price the item purchased at purchase price.

profit=sold price−purchase priceprofit = sold\,price - purchase\,price

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decimal
Price at which you will have to sell the item (according to the discount rate defined in settings).

selling price=market price∗discountselling\,price = market\,price * discount

If you have activated the shops fees parameter:

selling price=market price∗discount−feesselling\,price = market\,price * discount - fees

For figurines it is equal to the Market price:

selling price=market priceselling\,price = market\,price

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list
Store where you sold the item.
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decimal
Price at which you sold the item.
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decimal
The yield rate is the percentage margin for an item bought at purchase price and sold at selling price.

yield rate=profitpurchase price∗100yield\,rate = \frac{profit}{purchase\,price}*100

For sold items The yield rate is the margin percentage for an item bought at purchase price and sold at sold price.

yield rate=profitpurchase price∗100yield\,rate = \frac{profit}{purchase\,price}*100