The Most Expensive Mistakes Ranked by Cost
Not all mistakes are equal. Some cost you money, some cost you time, and some cost you both. Here are the mistakes ranked by the financial impact they cause.
Mistake #1: Skipping QC Photos
Always inspect every photo, not just the first one
Request additional angles if the standard photos are insufficient
Compare to retail reference photos stored in a folder on your phone
Do not approve QC when you are tired or in a hurry — mistakes happen then
Post questionable photos on Reddit for community feedback before approving
Remember: you cannot return after approving. The risk is entirely on you.
Mistake #2: Wrong Sizing
Never assume your usual size applies across all factories
Always measure your best-fitting item and compare to the batch chart
Read Reddit for sizing feedback on the exact batch you are buying
For shoes, half-size differences are common and significant
For clothing, length and width both vary independently
If between sizes, size up for comfort, size down for fitted looks
Mistake #3: Outdated Batch Codes
Always verify the spreadsheet's last update date before using it
2024 and 2025 spreadsheets are likely outdated for most items
Batch codes change as factories improve or decline
Search the batch code on Reddit before buying — if no results in 60 days, avoid it
The community updates faster than the spreadsheet — use both together
Mistake #4: Underestimating Shipping Costs
Always use the shipping calculator before committing to an order
Add 10-15% buffer for packaging and volumetric weight adjustments
Shoe boxes add significant cost — remove them when possible
Small frequent hauls cost more per item than one large haul
Check for current shipping coupons before every submission
SAL is cheapest but slow — only use it if you are not in a hurry
Mistake #5: Buying Without Reddit Research
Never buy from a batch with no recent Reddit reviews
Read the comments, not just the top-level posts
Check for posts in the last 30 days — older posts may reference outdated batches
Look for negative feedback patterns — one bad post is noise, five is a signal
The spreadsheet plus Reddit is the complete picture — use both
Mistake #6: Poor Haul Planning
Do not mix urgent and non-urgent items in the same haul
Do not buy your first order with high-value items only — test the process first
Plan for customs — declare values appropriately for your country
Combine items from the same category to reduce shipping complexity
Remove packaging from bulky items to save on volumetric weight
Mistake #7: Ignoring the Category Gateway Pages
Read the category gateway before browsing the full catalog for that category
Use the what-to-buy and common-pitfalls sections to set your expectations
Check the QC tips section for category-specific inspection points
Review the sizing notes before ordering — every category is different
The category guides are updated alongside the spreadsheet for consistency