Work out barter value comparison instantly with clear inputs, formula shown and shareable results.
Your item's market value is adjusted upward by whatever premium you place on keeping it, and the difference from their item's value is the cash that would balance the trade. Barter stalls when both sides quietly apply a sentimental premium, so stating yours explicitly is what makes the negotiation tractable.
Adjusted value
adjusted = your market value x (1 + sentimental premium)
Balancing cash
cash = adjusted value - their item value
adjusted = your market value x (1 + sentimental premium). Your item's market value is adjusted upward by whatever premium you place on keeping it, and the difference from their item's value is the cash that would balance the trade.
Barter stalls when both sides quietly apply a sentimental premium, so stating yours explicitly is what makes the negotiation tractable.
Enter market value of your item, market value of their item, extra value you place on keeping yours. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.