What the price words mean
7-day median
A daily statistic the vendor publishes for that exact tier. It is not a single sale, and it is not an average across grades. If it is marked pooled, it may include other printings.
Market price
The figure the vendor publishes for an ungraded card in that condition, such as Near Mint. It is not a grade.
Vendor estimate
The vendor's estimate for a grade when there is no 7-day median. It is marked est. everywhere else on the site. The confidence shown beside a median is the vendor's confidence in this estimate, not a confidence rating of the median.
Pooled: a pooled graded series comes from the vendor's product-level pool, which may include other printings of the same product.
Not financial advice. A stale price is not a price you can sell at.