Console Game Collection Value Calculator

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Console Game Collection Value Calculator

Estimate the total resale/market value of your console game collection based on number of titles, average condition, rarity mix, and completeness (CIB vs loose).

Number of Games in Collection

Average Loose Cart/Disc Value per Game ($)

% of Games Complete In Box (CIB)

CIB Value Multiplier vs Loose (e.g. 2.5 = 2.5×)

% of Games Considered Rare/Valuable

Rare Game Value Multiplier vs Average (e.g. 5 = 5×)

Overall Collection Condition

Excellent / Like New Good / Played Fair / Worn Poor / Damaged

% of Games Professionally Graded (WATA/VGA)

Graded Premium Multiplier (e.g. 4 = 4× base value)

Calculate Collection Value ...

function conCalc() { var numGames = parseFloat(document.getElementById('con-num-games').value); var avgLoose = parseFloat(document.getElementById('con-avg-loose').value); var cibPct = parseFloat(document.getElementById('con-cib-pct').value); var cibMult = parseFloat(document.getElementById('con-cib-multiplier').value); var rarePct = parseFloat(document.getElementById('con-rare-pct').value); var rareMult = parseFloat(document.getElementById('con-rare-multiplier').value); var condFactor = parseFloat(document.getElementById('con-condition').value); var gradedPct = parseFloat(document.getElementById('con-graded-pct').value); var gradedMult = parseFloat(document.getElementById('con-graded-multiplier').value); var el = document.getElementById('con-result');

// Validation if (isNaN(numGames) || numGames Please enter a valid number of games (≥ 1).'; return; } if (isNaN(avgLoose) || avgLoose Please enter a valid average loose value (≥ 0).'; return; } if (isNaN(cibPct) || cibPct 100) { el.innerHTML = 'CIB % must be between 0 and 100.'; return; } if (isNaN(cibMult) || cibMult CIB multiplier must be ≥ 1.'; return; } if (isNaN(rarePct) || rarePct 100) { el.innerHTML = 'Rare % must be between 0 and 100.'; return; } if (isNaN(rareMult) || rareMult Rare multiplier must be ≥ 1.'; return; } if (isNaN(gradedPct) || gradedPct 100) { el.innerHTML = 'Graded % must be between 0 and 100.'; return; } if (isNaN(gradedMult) || gradedMult Graded multiplier must be ≥ 1.'; return; } if ((cibPct + rarePct + gradedPct) > 100) { el.innerHTML = 'CIB % + Rare % + Graded % cannot exceed 100%.'; return; }

// Derived counts var cibFrac = cibPct / 100; var rareFrac = rarePct / 100; var gradedFrac = gradedPct / 100; var looseFrac = 1 - cibFrac - rareFrac - gradedFrac;

var nLoose = numGames * looseFrac; var nCIB = numGames * cibFrac; var nRare = numGames * rareFrac; var nGraded = numGames * gradedFrac;

// Base values per segment (before condition) var looseVal = nLoose * avgLoose; var cibVal = nCIB * avgLoose * cibMult; var rareVal = nRare * avgLoose * rareMult; // Graded games are typically rare + CIB, so combine both multipliers var gradedVal = nGraded * avgLoose * rareMult * gradedMult;

var rawTotal = looseVal + cibVal + rareVal + gradedVal;

// Apply condition factor (graded games are already graded so condition less relevant, // but the calculator applies a softened factor: graded only gets 10% condition penalty at most) var gradedCondFactor = 1 - (1 - condFactor) * 0.1; var adjustedTotal = (looseVal + cibVal + rareVal) * condFactor + gradedVal * gradedCondFactor;

// Low / High range ±20% var low = adjustedTotal * 0.80; var high = adjustedTotal * 1.20;

function fmt(v) { return '$' + v.toFixed(2).replace(/\B(?=(\d{3})+(?!\d))/g, ','); }

el.innerHTML = '### Collection Value Estimate ' + '' + 'Loose Games (' + nLoose.toFixed(1) + ')' + fmt(looseVal * condFactor) + '' + 'CIB Games (' + nCIB.toFixed(1) + ')' + fmt(cibVal * condFactor) + '' + 'Rare Games (' + nRare.toFixed(1) + ')' + fmt(rareVal * condFactor) + '' + 'Graded Games (' + nGraded.toFixed(1) + ')' + fmt(gradedVal * gradedCondFactor) + '' + 'Estimated Total Value' + fmt(adjustedTotal) + '' + 'Realistic Range' + fmt(low) + ' – ' + fmt(high) + '' + '' + 'Avg value per game: ' + fmt(adjustedTotal / numGames) + '

'; }

#### Formula

Segment Values (before condition): Loose Value = N × looseFrac × avgLoose CIB Value = N × cibFrac × avgLoose × cibMultiplier Rare Value = N × rareFrac × avgLoose × rareMultiplier Graded Value = N × gradedFrac × avgLoose × rareMultiplier × gradedMultiplier Condition Adjustment: Adjusted Total = (Loose + CIB + Rare) × conditionFactor + Graded × (1 − (1 − conditionFactor) × 0.1) Range: Low = Total × 0.80  |  High = Total × 1.20

#### Assumptions & References

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