A performing note modeled at 92 cents can price closer to 74 once a buyer looks at servicing history
Take a seller-financed 1970s three bedroom in a secondary midwest market, sold 18 months prior at 168k, 5 percent down, the seller carrying 159.6k at 7.5 percent, 30 year amortization with a 5 year balloon, payment 1,116. A common plan is to hold the note 18 to 24 months for seasoning and then sell the paper to fund another position, underwriting the exit at creation based on the coupon. A seller in this position might model the sale at roughly 92 cents on unpaid balance, pricing off the coupon and payment history alone. In practice, bids often come in well below that. Two partials the seller doesn't want, one full-note bid at 68, the best full-note bid at 74. On a UPB of about 157.4k, 74 cents is roughly 116.5k against a 145k model, a real gap created by the model itself rather than the market. What buyers actually price on, consistently: loan to value at creation and how it has aged (95 percent at creation, still around 94 after 18 months on a 30 year schedule leaves thin protective equity), how far out the balloon sits with no evidence the borrower can refinance, whether payments run through a licensed third party servicer or directly to the seller's personal account with no independent payment history, and whether taxes and insurance are escrowed or the seller is simply trusting the borrower keeps insurance current. The lesson for anyone carrying paper with an eye toward selling it later: put at least 15 percent down on anything intended for sale, use a licensed third party servicer from the first payment, escrow taxes and insurance, and price the note at creation against the discount a buyer will actually demand rather than against the coupon alone.