Collector flip
Low fees, fast turnover. Protects margin on sub-100 lots.
04 / AUCTION — PRIVATE BIDDING INSTRUMENT
Know when
to stop.
Work backward from the sale. Fees, shipping and appetite in; a hard ceiling out.
Private bidding instrument
Know when
to stop.
Work backward from the sale. Fees, shipping and appetite enter here; a hard ceiling comes out the other side.
The room wants one more bid.
Lot analysis / GBP
The calculation
01
Expected exit
Target sell price
02
Auction house
Buyer premium
03
Fixed cost
Shipping
04
eBay / Etsy / other
Platform fee
05
Minimum return
Margin floor
HOUSE RULES
A ceiling is an exit.
Midrange tech
Buyer premium bites. Cap shipping surprises before you raise a paddle.
Premium spec
High hammer, high premium. Let the ROI floor do the refusing for you.
Maths only — not financial advice. Verify house terms per sale; premiums and caps vary.