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COMC Port Sales: Bundle Limits, RFPs and the Real Cost

Learn how COMC portfolio sales work, why an accepted RFP is not a completed sale, and how inventory changes and later shipping affect your decision.

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4 minutes

The short answer

A COMC port sale bundles listed cards. An accepted RFP still needs buyer funding and final acceptance. Recheck the contents before treating it as sold.
  • A portfolio offer needs its own inventory check; the lot can change while you negotiate.
  • The advertised promotion charge is separate from the rest of your transaction costs.
  • Use a bundle to meet a collecting or selling goal, not because the average price alone looks low.

What can you put in a port sale?

COMC lets sellers use their active inventory or filter by sport and years. Start in Promotions Manager. The published limit is 2,000 items, and the promotion costs $5 per week or until sold. It can be canceled through the same manager.

Before starting, make a private snapshot of the included cards and quantities. Mark the few cards you would regret selling as part of a general clearance. If those cards do not fit the intended deal, change the scope before negotiating rather than hoping a buyer overlooks them.

COMC lists minimum offers of 10% of SRP or 20% of asking price, without fully explaining baseline selection. Check the actual offer form.

Why is an accepted RFP still waiting?

An RFP (Request for Proposal) does not reserve the buyer’s Store Credit. Seller acceptance sends a proposal back to the buyer, who must have sufficient credit and accept it to execute the transaction.

For a hypothetical $600 proposal, a buyer with $500 available is still $100 short before considering any other applicable charges. An enthusiastic message and an accepted negotiation are useful progress, but the practical checkpoint is the executed transaction and the corresponding inventory change.

Keep a simple record of proposal amount, current item count, last counteroffer and completion status. When comparing two negotiations, compare the same current cards; a newer price for a smaller portfolio is not necessarily a better offer.

Follow the transaction, not just the offer message
  1. ScopeWhich cards are included now?
  2. ProposalWhat price was negotiated?
  3. FundingCan the buyer complete it?
  4. CompletionCheck transaction and inventory

Schematic. This checklist separates negotiation from a finished purchase.

What if a card sells separately during negotiations?

Individual cards may keep selling, and newly priced cards can enter an active port. COMC says an offer containing sold items must be revised through a counteroffer with those items removed.

Imagine a 200-card bundle discussed at $600. Before completion, a card you especially wanted sells separately. The updated 199-card offer should be judged on its remaining contents, not by subtracting one two-hundredth of the old total. The removed card may have driven much of your interest.

As a seller, reconcile the offer immediately before accepting. As a buyer, review the removed-item list and changed total before funding. Save the final version, because a screenshot from the start of the conversation no longer describes the executed deal.

How should you compare a port sale with selling individually?

Illustrative planning arithmetic: selling 200 cards together for $600 produces $3 per card before deductions. Selling every card individually at an assumed $4 average would total $800. The $200 difference is a hypothetical gross gap, not proven profit; it ignores unsold stock, time and fees.

Two charged promotion weeks at the published weekly rate would add $10 of promotion expense. Build the comparison from the actual sale proceeds, promotion charges and any applicable transaction or cash-out costs. Do not treat a selling balance as money already withdrawn to your bank.

COMC’s shipping-mode guide says port purchases do not prepay the per-item shipping charge. If you want the cards delivered, account for that later charge and the shipment quote. A buyer planning to keep cards on the platform and one planning immediate delivery have different total-cost questions.

Compare cash-out with a purchased-credit refund

Read a COMC shipment request

Frequently asked questions

Does port mean I must sell everything in my account?

No. Check the filtered inventory list before activating the sale.

Is SRP the same as a verified sold price?

Do not use the offer threshold as evidence of market value. Research important cards separately using matching completed sales.

Can I assume every card costs the portfolio average?

The average divides the total by the quantity. It does not show which cards provide value or whether the remaining commons suit your collection.

Should I fund an old proposal without reopening it?

Recheck the current contents and terms first. Your decision should concern the deal that will execute, not an earlier screenshot.

Sources

Product checklists, definitions, and policies can change. These sources were reviewed on 2026-10-26.

  1. COMC port-sale setup and RFP guideOfficial setup and negotiation instructions, reviewed October 26, 2026.
  2. COMC shipping modes and port purchasesReviewed October 26, 2026. Port purchases leave per-item shipping charges for a later shipment request.

Card Collector Capital publishes educational research, not financial advice. Card prices, populations, checklists, and grading policies can change. Verify the exact card and current information before buying, selling, or submitting a card.