Look It Up Before You Buy (and Keep a Record)
Almost every reselling loss starts the same way: a purchase made on instinct. The item looked like a bargain, the seller seemed motivated, and nobody checked what the thing actually sells for once fees, shipping, and honesty are applied.
Looking it up takes about five minutes. Writing down what you found takes another thirty seconds. Together they are the highest-return habit in secondhand buying, and the second half is the part almost everyone skips.
What to look up, in order
- Sold comps, not asking prices. Filter for completed sales on the platform where you intend to sell, and look at the last 30 to 90 days
- The spread, not the average. What sold fast, and what sat for months at a similar price
- Condition adjustment. A flawless example and a worn one are different products with different ceilings
- The fee on that platform at that price, so the sale price becomes a net number
- The shipping cost if you are paying it, including the fee charged on shipping
- How many are currently listed. Twenty identical items with no sales is not a pricing problem
Do the subtraction before you hand over money
A number that looks like profit becomes a different number quickly. A $25 thrift find that resells for $60 on eBay sounds like $35 of margin until the fee of roughly $8.25 and a $9 label come out, leaving about $17.75 before your time.
That is still a profit, but it is a different decision than the one you thought you were making. If the item cost $40 instead, the same sale loses money. The lookup is what tells you which of those two situations you are in, and you only get to find out before you pay.
The part nobody does: keep the record
A single lookup is a decision. A hundred lookups is data about your own buying. Once you write down what you found, patterns appear that no general advice can give you: which categories you consistently underprice, which sources actually produce margin, and which purchases you regret for reasons that repeat.
Keep it simple. For each thing you look up, note what it was, what you paid, what you expected it to sell for, where you planned to sell it, and what you actually got. Five fields, thirty seconds, in a notes app or the saved-comparisons history in this app.
- You find out which categories you are actually good at pricing, instead of guessing
- You catch the recurring mistake, whether that is overpaying at one source or ignoring shipping on heavy items
- You get a real sense of sell-through time, which is the number that decides whether your money is stuck
- You can compare two platforms on identical items and see which one earned more over a month, not in theory
Why the record saves more money than the lookup
The lookup stops one bad purchase. The record stops the same bad purchase twenty times, because it replaces the feeling that something is a good deal with evidence about what happened the last time you felt that.
It also turns pricing from guesswork into a lookup of your own past sales. After a few dozen recorded items, you no longer need to research a common category at all, you just check what you sold the last one for.
A habit that takes five minutes
- Check sold comps before you commit to any purchase above about $10, and always before anything above $50
- Convert the expected sale price to a net number on the platform you would actually use, before you pay
- Save the comparison the moment you decide, whether or not you buy, so the decision is on record
- Once a month, read back through the list and note the two categories where you were most often wrong
- Stop buying in those categories for a while, or demand a bigger margin there than feels reasonable
The rule to remember
Never pay for something based on what you think it is worth. Pay based on what it has recently sold for, minus the fee, minus the shipping, minus a margin for being wrong. That number is knowable in five minutes, and it is the difference between a side income and an expensive hobby.