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Purchase decision · demo-o22Ready to buySample

Apple Watch Ultra 3 × 20

Price-error monitor · electronics · ebay

Demo decision timing

Due on demo day

2026-09-01

Answer first · Capital OS recommends

Ready to buy

Expected and lower-price outcomes fit your current buying rules.

Exact boundaries to watch

Economic unit-cost limit: $651.16 / unit; Above this cost, the expected or lower-price economics no longer meet your rules.
Timing review begins: Above 45 days; A longer expected time to cash changes an otherwise eligible purchase to Wait.

Total purchase cost: $13,306.15
Expected deal profit: $2,819.39
Lower-price profit: $543.61
Expected time to cash: 22 days
Buying power left: $61,693.85

Show purchase limits and funding mix

Highest unit cost that still fits: $651.16
Highest quantity that still fits: 20
Cash used: $13,306.15
Credit used: $0.00
Estimated credit cost: $0.00

Your decision

Choose Approve to buy, Wait, or Skip before saving.

What Capital OS preserves

This sample stays in the current browser session.

Check the numbers

Edit assumptions

Use the best information you have today. Leave unknown values blank instead of guessing.

Expected sale price / unit

Lower sale price / unit

Quantity available

Time to cash (days)

Changing any number updates both outcomes, the recommendation, the highest safe unit cost, and the quantity that fits your buying power.

Expected outcome

Using the expected sale price you entered

$2,819.39

deal profit

Gross sales: $18,760.00
Profit margin: 17.3%

Show advanced return measures

Return on cost: 21.2%
Annualized estimate: 351.6%
Money × days: 292,735

Lower-price outcome

Using your lower sale price—not a statistical prediction

$543.61

deal profit

Gross sales: $16,133.60
Profit margin: 3.9%

Show advanced return measures

Return on cost: 4.1%
Annualized estimate: 67.9%
Money × days: 292,735

Buying rules · set 4

See how every rule was checked

7 required checks · open for the full calculation

Total cost fits your buying power

Required rule

$13,306.15

this purchase

$75,000.00

your limit

Credit needed fits available credit

Required rule

$0.00

this purchase

$22,800.00

your limit

Minimum expected deal profit

Required rule

$2,819.39

this purchase

$150.00

your limit

Minimum expected margin

Required rule

17.3%

this purchase

12%

your limit

Maximum lower-price loss

Required rule

$0.00

this purchase

$1,200.00

your limit

Maximum share in one purchase

Required rule

10%

this purchase

12%

your limit

electronics inventory concentration limit

Required rule

22.6%

this purchase

35%

your limit

Price evidence

Recorded input

Price-error monitor observed sales

Checked 4 days ago · high confidence