A top prize is not a probability.
A product may advertise a valuable watch or card, but its presence in a possible-outcome list does not tell you how likely you are to receive it. Check whether probabilities are published for the specific pack or box you are considering.
Value is not the same as cash.
A displayed retail, market or assessed value may differ from what someone would pay for the item. Condition, grading, fees, liquidity and changing demand can affect resale value. A stated floor may refer to an operator valuation rather than a guaranteed cash amount.
Multipliers describe a ratio, not your likely return.
Dividing a top item's stated value by the purchase price gives a top-hit multiplier. It does not describe the average result or the chance of receiving that item.
Expected value needs a complete model.
An expected-value estimate weights each outcome's value by its probability. Incomplete probabilities, uncertain values, fees or changing inventory can make an estimate unreliable. Even a sound estimate is an average over many hypothetical purchases, not a promise about your purchase.
Buyback has its own rules.
A buyback percentage may apply to an operator's assessed item value, not the amount you spent. It may return platform credit rather than withdrawable money. Check the valuation basis, timing, eligibility, fees and withdrawal conditions.
Verification has limits.
A published randomness mechanism does not by itself prove that prices, valuations, shipping or consumer protections are fair. Review the whole product and only spend an amount you are comfortable losing.