If you've sold cards for more than a few months, you've noticed something. The cards in different price bands behave differently. A $400 card flips fast. A $2,500 card sits longer but margins higher. A $50 card barely covers shipping and fees. The decision of where to put your inventory dollars is one of the most important business decisions a card reseller makes.

### What we mean by 3-digit and 4-digit cards

Active resellers segment inventory by sale price into rough bands. Cards in the $100 to $999 range (active resellers call these "3-digit cards") are the workhorse of most independent operations. Cards in the $1,000 to $9,999 range ("4-digit cards") are the high-margin, slow-turn segment. Cards under $100 are the low-end segment, often used as filler in lots or as loss-leader content for live break audiences.

The bands describe the sale price, not the buy-in. A card bought raw for $40 and sold graded at $250 is still a 3-digit sale. The bands also aren't a measure of card quality; they're a measure of where the card lives in the market.

Most independent resellers operate primarily in the 3-digit band. The reasons are mechanical, not aspirational, and they shape every other decision in this article.

### The math of churn vs margin

Churn is how many times your inventory dollar turns over in a year. Margin is the percentage profit per flip. The numbers below reflect typical patterns for active resellers in modern sports cards and vary widely by sport, era, platform mix, and grading discipline. Track your own turns and margins in KKATC Cards Portfolio for actual data on your specific operation.

A 3-digit card typically sells in 30 to 90 days at 25 to 40% margin. A reseller running $20,000 in 3-digit inventory at 6 turns per year and 30% average margin produces $36,000 in gross margin annually.

A 4-digit card typically sells in 90 to 180 days at 15 to 30% margin. A reseller running $20,000 in 4-digit inventory at 3 turns per year and 22% average margin produces $13,200 in gross margin annually.

The 3-digit reseller out-earns the 4-digit reseller on the same capital base, before considering risk.

### Carry cost and capital efficiency

Capital tied up in slow-moving inventory has an opportunity cost. Money sitting in a 4-digit card you're waiting to sell is money you can't use to buy more inventory, pay down credit cards, or fund grading submissions.

A 4-digit card that sits 180 days locks up $2,500 for half a year. Even at 0% interest, that capital missed two complete inventory cycles in the 3-digit band.

For most resellers, capital efficiency favors the 3-digit band heavily. The exception is collectors with significant working capital who can afford to tie up money in slow-moving high-margin inventory. For everyone else, the 3-digit band is where the money is.

### Risk profiles differ sharply

Cards lose value in two patterns: gradual decay, and sudden cliff.

3-digit cards tend to lose value gradually. A modern rookie that peaks at $400 the year of release might drift to $300 over 18 months, then $250 over the next year, then settle. Resellers who exit positions quickly avoid most of the drift.

4-digit cards tend to lose value on cliffs. A $2,500 rookie card can drop to $1,200 in a week if the player gets injured, gets traded to a smaller market, or hits a sustained slump. The thinner buyer pool at the top of the market means a few sellers panicking can compress prices fast.

Risk-adjusted, 3-digit cards are forgiving. 4-digit cards punish bad timing.

### Tax implications under §471(c) and §471(a)

Inventory accounting matters more for 4-digit cards because more capital sits unsold at year-end.

If you elect the §471(c) small business taxpayer method (available under the TCJA exception for businesses below the §448(c) small-business threshold, approximately $31 million for tax year 2025, indexed annually under the IRS revenue procedure issued each fall), you expense inventory in the year purchased, regardless of whether it sells. A $2,500 card bought in November becomes a $2,500 deduction in November, even if it sits in your case until April.

If you use the traditional §471(a) method, you can only deduct the cost of cards that actually sold. The same $2,500 card sitting unsold at year-end stays on your books as inventory and produces no current-year deduction.

The bigger your unsold 4-digit inventory at year-end, the bigger the difference between the two methods. For a reseller with $30,000 in cost basis of unsold 4-digit cards on December 31, the cash tax difference between §471(c) and §471(a) at a 24% federal bracket can exceed $7,000.

For the deeper mechanics of §471(c), see "How Taxes Work for Cards: Hobby, Dealer, Breaker."

### Practical allocation

Most resellers should anchor 70 to 80% of capital in 3-digit cards. The remainder, if any, goes to opportunistic 4-digit positions where the buy-in is unusually attractive (a card bought below comp at an estate sale, or a market dip on a card you have conviction in).

Allocating 100% to 4-digit cards is a high-conviction bet most resellers can't afford to lose. Allocating 100% to 3-digit cards leaves money on the table for resellers with working capital who can stomach longer holds.

For more on scaling capital allocation as your business grows, see "Scaling Your Business: 0 to 10K, 10K to 50K."

### Bottom line

3-digit cards turn faster, lose value gradually, and produce more annual margin per dollar of capital. 4-digit cards margin higher per flip but tie up capital and punish bad timing. Anchor your inventory in the 3-digit band. Treat 4-digit cards as opportunistic rather than core.

KKATC Cards Portfolio tab segments by price band. Use it to see your concentration.

This is general tax and business information, not tax advice. Talk to a CPA or enrolled agent about your specific situation.

Capital efficiency math, holding-period implications, audit-trail requirements, portfolio allocation by experience level.

3-Digit vs 4-Digit Cards: ROI and Risk