Read the number and abbreviation as one result
PSA’s qualifier glossary describes a card that meets a grade’s criteria except for a noted area. The abbreviation adds information; it is not decoration that can be dropped from a sales title. A buyer comparing labels needs the whole result to understand the condition being represented.
| Code | Meaning | What to examine |
|---|---|---|
| OC | Off-center | Front and reverse border placement |
| ST | Staining | Location, extent and appearance of the stain |
| PD | Print defect | Visible print flaw and how it affects the image |
| OF | Out of focus | Image focus or registration |
| MK | Marks | Writing, marks or associated impressions |
Use the qualifier to ask a better question
An OC label tells you to inspect centering, but the degree and visual effect still matter. A stain across a face may be more distracting to one collector than a stain on a largely blank reverse. Clear front and back photos help you evaluate that difference without pretending it changes the certified result.
Do not stop at the identified issue. Corners, edges and surface still determine whether you like the actual card. For remote purchases, ask for photographs that distinguish a holder reflection from the defect. If the seller cannot show an important area, keep that limitation in the comparison.
Create separate comparison groups
Search the exact issue with the complete label, such as PSA 8 OC, and build that group separately from PSA 8 and PSA 6. Match year, set, parallel, card number and date range. A numerical shortcut that treats every qualified 8 as an unqualified 6 is not a market valuation method.
Illustrative worksheet: place one sale of PSA 8 OC in a qualified group and a sale of PSA 8 in an unqualified group. If the qualified group contains only one result, report a single observation with a date rather than presenting it as a stable average. An asking price for the same label is additional context, not a completed sale.
Why one fixed discount does not work
The effect on price depends on the specific issue, visible defect, available alternatives and collector demand. A scarce card that rarely appears at all poses a different choice from a common card with many clean copies available. A fixed percentage copied from another player ignores those differences.
For a collection decision, write down what you are saving and what defect you are accepting. If an unqualified example is $200 and the qualified example is $130, the discount is $70, or 35% of the $200 reference. Those numbers are hypothetical arithmetic; they do not establish what any actual qualifier should cost.
Avoid assuming old and current labeling works identically
PSA’s current FAQ explains that some defects may be shown with a qualifier or reflected in a numerical grade. A missing qualifier therefore does not prove the absence of every print flaw or centering issue. Read the present standards and the specific card rather than assigning a universal rule to a label generation.
Resubmission is a separate service decision. Do not assume asking for a different labeling treatment will preserve the number or improve the value. Keep the existing slab intact while you confirm the available route and possible outcomes.
Record enough detail to find the right card later
Use separate inventory fields for grader, number, qualifier, certification number and an objective defect note. For example: “PSA / 8 / OC / cert recorded privately / noticeably wider left border.” This keeps your notes searchable without implying you independently graded the card.
When listing the card, include the qualifier in visible text and show both sides of the label. If you cite a population number, check whether the lookup distinguishes the category you are discussing. Do not merge qualified and unqualified counts into a scarcity claim unless the source actually reports that combined category.
Frequently asked questions
What does PSA 8 OC mean?
It is a PSA numerical grade of 8 with an off-center qualifier. Read the complete result and inspect the centering rather than comparing it as an ordinary unqualified 8.
What does ST mean?
ST identifies staining. Photographs should show where the stain is and how much of the card it affects.
Are PD and MK the same?
No. PD identifies a print defect; MK identifies marks. They describe different condition issues and should not be substituted in an inventory or listing.
Is every qualified 8 worth the same as a 6?
No. Price depends on the exact card and defect. Compare completed sales with matching labels and report the limits of a thin sample.
Does no qualifier mean a flawless card?
No. A numerical grade can reflect defects, and the card’s grade has its own condition allowances. Inspect the card and read the current standards.
Should I include OC in my eBay title?
Yes. A qualifier materially describes the result. Omitting it can make the title imply a different condition category from the label.
Sources
Product checklists, definitions, and policies can change. These sources were reviewed on 2026-09-30.
- PSA qualifier glossaryDefinitions of OC, ST, PD, OF and MK.
- PSA FAQQualifier versus numerical treatment of specified defects.
- PSA Population SearchCheck the exact reported category before making population comparisons.
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.