You used some odd phrasing, so this is hard to follow. He didn't receive "more than the cost of the assets" for that $570,000 which is not Cost but Price. He Sold a bunch of different things at agreed upon price points. He didn't get fully paid for that sale. He accepted some money now and agreed to accept some money later and/or over time. That means payment terms. Payment terms do not drive what was sold or the price point; they are how it is being paid for. You describe a gain, but that is based on what starting point?

For this: "No depr recapture, many are 10+ years old." Many? Was there remaining book value for anything? Was none of it depreciated, or some was fully depreciated? The way you phrased this part, it's too vague.

To get specific help, you should provide specific details. Thanks.