But at the end of the day, does it matter to what level of precision the value is concluded in terms of credibility and acceptability?
While we might mock (and I have done so) the value indication that comes in at $437,521, am I going to determine that it is unreliable, but a reliable indicator would have been $437,000 or $438,000? The answer is "no". If $437,000 or $438,000 are supported, then so is $437,521. Its the precision is unexpected, but in the context of the intended use and SOW, it is acceptable.
The failure to understand the USPAP is the bigger problem. The practice of rounding a value opinion to the nearest dollar in a mortgage finance transaction (or most others... but I've been court where such a small difference results in the owner having his house foreclosed upon vs. having a 2nd lien dismissed) is not expected and not taught, and is arguably not a "best practice", but by itself, it isn't significant in the evaluation of the overall credibility of the the value.