Why spreadsheets fall behind

A manual sheet captures what a card was worth the day you typed it. Prices move, your collection grows, and re-pricing everything by hand is a chore nobody keeps up. The number you are looking at is almost always old.

Track from live comps

Better tracking re-values each card from recent realized sales automatically. Add a slab by scanning its label, and the value — and your collection total — updates as the market does, no manual upkeep.

One number to watch

Beyond the dollar total, a single protection score tells you how exposed the collection is — insurance gaps, concentration, storage, liquidity, provenance. Slabline gives you both the live value and the 0–1000 Slabline Score, free for up to 25 cards.